Since the implementation of the regulations on the limit-driving of truck in urban areas of big cities, the study on route and time of city distribution gradually gets more attention. To improve the efficiency of distribution transport, not only the length of the routes need to be considered, but also the traffic conditions as well, even along with freight station locations and etc. Based on the traffic data of Beijing as an example, this paper analyze the differences in traffic distribution in aspect of time and areas, which will be taken into considered the distribution selection strategy with time window, so that we can ensure the freight trucks in delivery and pick-up processing avoids peak congestion. Finally take company A as an example, introduce the dynamic replenishment method to different districts considering their own particular congestion status. We expect to bring some inspiration to the vehicle allocation decision of online freight companies.