Based on the survey of applicants for rolling car numbers in Beijing，this paper evaluates the current policy of restricting the purchase of car in Beijing. The survey found that the policy effectively controlled the excessive growth of the number of cars and played a positive role in alleviating traffic congestion. However，due to the increasing number of roll applicants and the declining rate of winning tickets，the public demand for car purchase was not met and the evaluation of the current policy was low. At the same time，the survey found that the public hopes that new energy indicators can be directly allocated to car-free households，and that the stock of individual buses can be traded and transferred，which is conducive to stabilizing the public’s expectations for the future and making full use of the market to regulate the relationship between supply and demand to revitalize the stock，and the relevant policies can be given positive attention.