Train traction simulation of high speed motor train set has significant role with the rapid development of our country's high speed railway. The calculation method of train traction simulation of high speed motor train set is studied and its differences with general train traction calculation and its relative key theories are provided. The structure and functions of our independently developed traction simulation system are introduced afterwards. The actual applications of Beijing—Shanghai high speed railway include: calculation of four different train running projects; calculation and analysis of position and effect for a contact wire neutral section; simulation of utmost speed test in leading part of Beijing—Shanghai high speed railway. It is concluded by applications that the method of train traction simulation of high speed motor train set has good simulation precision and practical usage. It provided an efficient way to our country's high speed project constructions. The development direction based on it are proposed in the end.