The invention provides a rail transit deicing and snow melting system. The rail transit deicing and snow melting system comprises an indoor control module and an outdoor heating control module, wherein the indoor control module is connected with the outdoor heating control module; the outdoor heating control module includes a power input module, a power protection module, a power control module, apower acquisition module, a heating module, a rail temperature acquisition module and a controller module; the power input module is connected with the power control module through the power protection module, the power protection module is connected with the controller module, the power control module is connected with the rail temperature acquisition module through the heating module, the railtemperature acquisition module is connected with the controller module, the controller module is connected with the power acquisition module, and the power acquisition module is connected with the power control module. According to the rail transit deicing and snow melting system, the work of third rail ice melting is completed, the state of a third rail can be monitored in real time and remotelycontrolled, and the operation of ice melting and deicing is carried out at the first time.