With the constant development of China’s automobile manufacturing industry, automatization level of auto production improves unceasingly. As the important part of automatic production line, the evolution and development of the trolley slide effectively promote the improvement of overall productivity. The problem of motor selection as one of the kernel problems of trolley slide design is great significance in guiding the improvement of the trolley slide’s structure and nature. Aiming at this problem of motor selection for trolley slide, based on a certain rule of production rhythm planning, the application of the virtual prototype technology was used for the theoretical analysis for its mechanism. So that the driving load of motor is acquired, and by using the peak torque and rotational speed limits criterion, the motor optimization selection can be realized.