Since 2017，Beijing has successively issued a series of policies that regard the simultaneously development of the rent-purchase housing market as an important measure for Beijing’s long-term housing regulation mechanism. The development，maturity，and standardization of the housing leasing market will help to effectively use housing resources and better improve the living conditions of urban residents，and has a significant impact on the overall operation of the housing trading market and the real estate market. In order to diagnose the trends of Beijing rental housing price，this study uses a quantitative analysis of Beijing’s housing rental market price data in the past five years，and analyzes the causes behind the rental trend from the macro，meso，and micro levels. The study found that in the past five years from 2014 to 2019，the second-hand residential rent index in Beijing showed a volatile upward trend；in 2018，Beijing’s rental growth rate was the highest in five years，showing a trend of “increase first and then stabilization”；The overall rental price in 2019 is relatively stable，and the trend of rents Showing differentiation between core urban areas and non-core urban areas in Beijing. Based on the empirical data of Beijing，the study shows that the main influencing factors of rent in Beijing are the migrants and total housing sales. The total amount of migrants and housing sales increased by 1%，the rental housing price increased by 1.68% and decreased by 0.373% respectively. On the meso level，the price rise of Beijing housing rental market is affected by industry tax，financial policy and other factors；at the micro level，the financial behavior of leasing agency and the imbalance of supply and demand of rental housing in Beijing have pushed up the market price of rental housing. In addition，the rise of rent in Beijing along with the same direction of housing sales prices is to some extent a market-oriented repair of the low rent-to-sales ratio in the housing market. In the end，some policy suggestions are put forward to regulate the housing rental market，stabilize the housing rent and implement the long-term regulation mechanism of Beijing real estate market.