Abstract: To understand the influence factors of private car ownership in Hebei province,data of private car from 2005to 2015is collected.Private car ownership is chosed as an explained variable,five explanatory variables are selected by least squares regression.It is found that the main influencing factors of private car ownership in Hebei province are the highway mileage,density of urban population and urban per capita disposable income.Some suggestions are put forward according to the influencing factors. 

Key words: Private car, Regression analysis, Least square method, Influencing factor