Rail transit communication signal lamp capable of collecting rain wash

A rail transit communication signal lamp capable of collecting rain wash comprises a main body and a protection block. The bottom end of the main body is connected with a base to enable the main body to be placed on the ground, one side of the main body is connected with an indicator lamp to irradiate different light rays for traffic guidance, and the top end of the indicator lamp is connected with the protection block to prevent foreign matter from falling onto the indicator lamp; and a water flow open groove is a rectangular hollow open groove at the top end of the protection block. According to the device, the buoyancy plate can be driven to rise through buoyancy when different rainwater flows into the protection block, so that a lifting shaft of the buoyancy plate is driven to rotate, and a pressure applying plate can continuously deflect and move; and the internal water flow is extruded to be sprayed out from the drainage groove so as to wash and clean the indicator lamp. 一种能够收集雨水冲刷的轨道交通通信信号灯，包括：主体和防护块，主