Abstract: In order to explore the mechanism of the influence of family members' activity arrangements on the decision-making of car use, based on the survey data of residents travel in Qujing in 2015, combined with activity-based analysis and time geography, six models of car use wereput forward, and also established decision making process model for family car use. The results show that the temporal-spatial constraint of family members is the key factors to determine the car allocation, because members who participate in subsistence activities prefer to get priority to the use of cars, but in the subsistence activity, female are easy to form car dependent; the activities of members of the arrangement will further affect the distribution of the right to use cars, the male's activities arrangement have more influence on female to use cars, and transfer the right of car use.