China's urban rail transit is gradually transitioning from independent single line operation to a multiline network operation mode. The rolling stocks is the most important mobile transportation resource. Compared with the existing single line operation mode, the network operation organization mode can effectively improve the efficiency of train base operation and reduce operating costs. This article takes the shared use of multiple lines in a rolling stocks depot as the background, and takes the routes of two shared rolling stocks depots as an example to establish a model for planning the use of stocks scheduling for multiple lines in rolling stocks depots. Select the maximum and minimum ant colony algorithm for solving, calculate the rolling stocks scheduling for independent mode and shared mode of the vehicle depot, and compare the obtained rolling stocks scheduling. The results indicate a decline in the number of locatives and vehicles below 100 minutes and above 400 minutes, exceeding all equilibrium levels. The plan of using multiple shared locomotives and vehicles can effectively reduce the number of locomotives and vehicles used, improve rolling efficiency, but it will lower the balance level of locomotives and vehicles.