Automatic connecting wire harness and air pipe structure of trailer

The utility model particularly relates to an automatic connecting wire harness and air pipe structure for a trailer. The automatic connecting wire harness and air pipe structure comprises a pneumatic structure, a hollow trailer traction pin and a saddle, the hollow trailer traction pin is provided with a signal air pipe pneumatic quick connector female head, a socket and a normal air supply pipe pneumatic quick connector female head, an infrared emitter is installed in the center of the hollow trailer traction pin, and a positioning pin hole is further formed in the hollow trailer traction pin. The pneumatic structure comprises an electrical part connecting plate, a signal air pipe pneumatic quick connector male head, a plug and a normal air supply pipe pneumatic quick connector male head are arranged on the electrical part connecting plate, an infrared receiver and a positioning pin are further arranged on the electrical part connecting plate, and a fixing support is installed on the electrical part connecti