Abstract: At present, the modern tram system in our country is still in the initial stage of development. Most mechanical and electrical equipment continue to use the traditional track system, there are some signals of mechanical and electrical equipment used directly abroad, which lead to the high cost of construction, long period of maintenance, poor general performance. Taken the three-phase AC switch machine used by speed-raising turnout as a control object, this article studied on the main track switch control module which was suitable for China's modern tram development needs. The technical indicators of the model meet the requirements of operation safety and performance for main track signal system of modern tram.