The invention relates to a streetcar turnout control system. The system includes a turnout controller, a full-electronic execution unit, a train-ground communication loop line, a special signal machine, an underground-type point switch, an axle counter and the like. Moreover, the system has a control center centralized control pattern, a vehicle-mounted decentralized control pattern and an in-place control pattern, supports various interface modes such as an I/O interface mode and a network interface mode and achieves a signal equipment alarming function. The streetcar turnout control system has the following advantages that an SIL4 safety level is achieved, various control patterns such as the control center centralized control pattern, the vehicle-mounted decentralized control pattern and the in-place control pattern are implemented, various external interface modes such as the I/O interface mode and the network interface mode are achieved, and the signal equipment alarming functionis achieved.