Abstract This paper to explore how policy changes affect real estate market in Beijing, to help readers understand how policy change to influence Beijing real estate market demand, the reader can understand the further development of Beijing real estate market, the paper is divided into three parts: the first is to explore the environment of Beijing real estate ; the second part of the real estate market in Beijing before the Olympics Games; the third part discuss the development of Beijing real estate market since Olympic Games , let readers understand the development and change of Beijing real estate market . Under the guidance of cancels the welfare lotteries policy , Beijing real estate market began to sprout, Beijing Olympic Games successful application, led to the rapid growth of Beijing real estate market, Beijing Government uses the reversion policy to regulates the supply and demand structure of market ,to guidance real estate market development, but was unable to suppress the house price effectively fast rising. The real estate has the characteristic which buys rises does not buy falls, before in 2008 Olympic Games, the people's anticipated house price will continue to rise, housing demand continues to expand, The market has the situation which falls short of demand¡FBut with the end of the 2008 Olympic Games, the "Olympic effect" gradually cooling down, the market return to a rational development , But with the end of the 2008 Olympic Games, the "Olympic effect" gradually cooling down, the market return to a rational development, people expect house prices to fall, resulting in a wait and see attitude ,Market oversupply occurs, the government resorted to liberal policies to stabilize the mortgage market. With the end of the Olympics, the Beijing government redrawing of the regional economic development, and actively promote the "era after the Beijing Olympics", In the future Beijing real estate development focus from the central area of the city gradually migrate outward circle, Function complete, facility perfect, convenient communications new town will become the new sales hot spot.