The new crown epidemic has accelerated the process of the ruins of American metropolises – thousands of rich people have “fled” from New York, San Francisco and other super first tier cities, and homeless homeless people are all over the streets, which is having a profound impact on the style, structure and economy of cities and even the United States. Under the multiple attacks of economic recession, new epidemic situation and ethnic protest, social conflicts in the United States have become increasingly prominent, especially in large cities. Take New York City as an example, the citizens complain about the increasingly serious problem of Vagabonds. The New York City government even wants to solve a series of public security and health problems of Vagabonds. It spends a total of $2 million a day to put the tramps in star hotels, and the room charge per person is as high as 175 dollars per night. This has aroused new public resentment. The counter urbanization in the United States has been going on for many years. In recent years, the high pressure and high cost of living in big cities are driving people away. The outbreak of the new epidemic has undoubtedly accelerated this trend. During the period from March 1 to May 1, when New York City became the “epicenter” of the world’s new epidemic, about 5% of New York residents left the city, equivalent to about 420000 people. < p > < p > based on the research data of more than one million users, redfin, an online real estate platform, recently reported a record number of people who expressed their intention to leave big cities. In the second quarter of this year, 27.4% of users showed a positive willingness to move to small towns. New York, Los Angeles and San Francisco became the top three cities with the most significant trend of population outflow. Redfin economists believe that this situation will continue or even intensify in the second half of the year. Rent in Manhattan, New York City, has also seen its biggest decline in nearly a decade. Real estate agents in New York also say that even in the suburbs of New York State other than New York City, such as some small towns in upstate or the rich district of Long Island, the Hamptons), housing sales and rental activities have increased rapidly, indicating that many residents of New York State not only have to leave New York, but also plan to “escape” the entire New York metropolitan area. The outflow trend of the rich class is the most obvious. In the wealthiest neighborhoods of New York City, including upper east district, West Village, SOHO district and Brooklyn Heights, the population of residents has decreased by 40% or even higher, while the rest of the city has experienced varying degrees of population outflow. The phenomenon of < / P > < p > is well understood. Compared with ordinary people, it is much easier for the rich to move. Because they usually do jobs that are flexible and have second homes like vacation homes. Since the outbreak of Xinguan epidemic, remote office mode has been popularized rapidly. A large number of technology and financial companies have announced that employees can work at home at least until 2021, and many companies even state that home office will become the new normal in the future. Many of the high-income groups do jobs that can be done remotely, so there is no need for them to stay in the city. Many left at the height of the epidemic in New York, and did not plan to return after the infection rate dropped significantly. < p > < p > people who have the financial ability to leave the big cities, but they don’t have such an easy choice. In the face of the unprecedented economic crisis and the global pandemic, the low-income and unemployed groups are facing the survival crisis, and a series of social problems surrounding the vagabonds are more prominent. The low-income group is in a bad living condition. Especially in big cities, the living space of low-income groups is crowded and narrow, and the new coronavirus exposes them to higher risk of community transmission. The blue collar jobs they usually work in can’t be operated remotely, so they are faced with the dilemma of losing their jobs or going to work at the risk of getting sick. Just looking at the epidemic data of New York State, we can see that the areas where low-income groups are concentrated are also the areas with the most serious infection. < p > < p > the widespread unemployment problem has made them fall into a deeper predicament. Data for the first week of August showed that more than 15 million Americans were still applying for unemployment benefits, an order of magnitude higher than in previous recessions. With the federal unemployment benefit of $600 a week due at the end of July, although the trump government signed an administrative order to extend the unemployment benefits, it reduced the weekly subsidy to $400, and there were still many obstacles before its implementation. People who had previously relied on government subsidies have almost lost their final source of income and are likely to face basic food and clothing problems. Many are relying on schools, food banks, social service centers and other free food distribution agencies to feed. < / P > < p > the problem of vagabonds in urban areas is even more unsolved. Before the outbreak of the epidemic, the problem of vagabond has long troubled American society. Especially in New York, San Francisco and other world-famous metropolitan centers, walking on the streets almost everywhere you can see a large number of tramps. In 2019, there are an estimated 560000 homeless people in the United States. The first reason is that the conditions are bad and the second is that the capacity is not enough to solve the problem effectively. Since the epidemic, the number of vagrants in major cities has increased dramatically. President trump took this opportunity to accuse House majority leader Pelosi, saying that she should return to San Francisco to solve the homeless problem, rather than stay in Washington, D.C., trying to solve the national problems. < p > < p > < p > “crime wave” began to emerge. The number of shootings in New York City in July increased by 177% over the same period last year. The New York Police Department recorded 244 shooting incidents in July 2020, and police said there was an increase in shooting incidents in almost every district. As of July 31, the number of shootings in New York City has increased by 72% this year compared with the same period last year. The number of murders, burglaries, car thefts and drug abuse cases also increased significantly over the same period last year. < / P > < p > the wealthiest neighborhoods are not immune. In the past four weeks, there have been 27 robberies on Manhattan’s upper east side, a 286% increase over the same period last year. In addition, public health problems need to be solved. Residents of Manhattan’s Upper West Side protested as homeless people began to pile up near their homes, bags filled with leftover food scraps, cans and bottles, and on the sidewalk. Citizens can’t bear to spend millions of dollars or more to buy a home, but now the quality of life is greatly reduced. The rich fled in a hurry, the poor struggled, and the masses hated each other. At present, both the federal government and the local government have not found effective means to ease the increasingly acute social contradictions, and limited measures often further arouse public resentment. The federal government of the United States has always ignored the policy of improving people’s livelihood. Social welfare is scarce, and infrastructure is obsolete. This time, it has been doing nothing to combat the new epidemic. The federal government even said it would cut spending on virus testing as new cases hit a second peak in nearly two months. < p > < p > in order to solve a series of social problems caused by vagrants and prevent the widespread spread of new coronavirus, the New York City Government has come up with a solution: the government pays more than 10000 tramps to stay in 139 idle star hotels in the city, paying 175 dollars for each room per night, which will cost the government 2 million dollars a day. Currently, the project will last until October and is likely to be postponed. Even if it lasts only two months, it will cost the government about $120 million. Obviously, this measure has aroused new public resentment and controversy. Ordinary citizens regard these vagabonds as the source of social risk factors, and can not accept why the tax paid is used to entertain homeless people who destroy their communities to stay in luxury hotels. They have expressed their strong dissatisfaction on social networking sites. Since May, the BLM ethnic unrest in the United States has made everything worse. Many small and medium-sized business owners say that their business has been attacked by vagrants, robbery and theft are not uncommon. More than a dozen people were injured and more than 100 arrested by police in downtown Chicago, the worst city in the country, this week. In New York, Portland and other places, the protest has been fermenting for more than two months, and there are inevitable violent conflicts. < / P > < p > dissatisfaction with policies and living conditions is likely to drive more citizens to leave. The New York City government was originally considering imposing extra taxes on millionaires, but given the current situation, the government is even more worried that the rich will never return, which will have a greater impact on the government’s tax revenue. For example, the public health budget of the New York City Government in 2021 has been cut by more than $100 million, which is one of the reasons for the above-mentioned Street garbage accumulation phenomenon. The reduction of tax revenue will further worsen the fiscal situation. However, the government should pay to solve the problems such as the new epidemic situation, vagabonds, social unrest and polarization between the rich and the poor. Cities lacking financial support will fall into a more chaotic social situation and fall into a vicious circle.