The Rapid development of the country economy accelerates the course of urbanization and industrialization since implementing the police of open and reform, especially in the past 10 years. The increase of traffic demand and the improvement of living level promote the step of people buying cars. The trend of using personal cars is becoming more evident and the road capacity can't meet the demand of road traffic. On the other hand, although the parking facilities in China cities have developed rapidly, there is an evident gap between the demand and the supply, especially optional setting curb parking has affected the road traffic seriously, which has made the static traffic problem in many cities become more and more outstanding.The influence of curb parking on road traffic is inevitable, how to plan the curb parking scientifically, set the curb parking reasonably, and seek the ration criterion to set curb parking, can maximize the whole parking benefits. The research work of this paper will relay on the national natural science fund projectResearch on key means about vehicles parking in cities under new situation(serial number: 50308005).This paper summarizes the history and the trend of curb parking theory both in home and abroad to briefly conclude the shortage. The method of analyzing the relation between demand and supply of curb parking, the impact and the delay the curb parking put on the traffic flow, and the scale of curb parking and setting method from macro-view, median-view, and micro-view aspects is brought forward. Through the analyses, the whole benefits of setting curb parking are maximized.With the enquiry and observation on the spot means of curb parking, the survey data are classified to be analyzed. The form theory of curb parking is analyzed from the two aspects of curb parking demand and curb parking supply. The non-linear optimal model is proposed under the restrictions of demand and supply in term with the traffic data surveyed in the cities. With the design of viable aspects method, the optimal macro-proportion of curb parking can be worked out.With the analysis of study objects, research contents, effect factors and variables selection, the traffic flow models before or after setting curb parking are established. With considering the different road transects and flow conditions, the velocity models of road traffic flow are analyzed from micro-view aspects. The setting form of curb parking and arrive - leave frequency are analyzed detailedly to cluster these factors into space obstacle rate and time obstacle rate. With the basis of establishing velocity model before or after setting curb parking, delay is introduced to reflect the criterion of setting curb parking. The decelerating-accelerating delay model and follow delay model after setting curb parking are educed, and the model parameters are assured to ensure the affecting factors and form the ration criterion of setting curb parking.The parking choice relations are analyzed with considering the matching relationship between the curb