The invention discloses a communication radar receiving station alternating current fan heater. The fan heater comprises a housing, a heating pipe, a blower fan and a control box. An overheating protection device and a control module are arranged in the control box. The overheating protection device is composed of a time delay relay, a temperature controller and a fuse. The heating pipe and the blower fan are arranged inside the housing. The heating pipe is connected with the blower fan. The time delay relay is connected with the blower fan and the control module. In the alternating current fan heater, the heating pipe is subjected to forced refrigeration and heat radiation through the blower fan, and thus indoor temperature can be adjusted. The structure of the whole product is simple, operation is convenient, and guarantee is provided for normal operation of a communication radar. In addition, the control box is equipped with the overheating protection device, therefore dual protection effects on a device are achieved, and usage safety of a communication radar is raised greatly.