The utility model discloses a radio frequency automatic gain control circuit. The radio frequency automatic gain control circuit comprises a radio frequency front end amplifying circuit, the input end of the radio frequency front end amplifying circuit receives radio frequency signals, one channel of the output end of the radio frequency front end amplifying circuit passes through an intermediate frequency VGA amplifier and a first AD conversion module to be connected with one input end of an FPGA module, and the other channel of the output end of the radio frequency front end amplifying circuit passes through an RSSI signal detection module and a second AD conversion module to be connected with the other input end of the FPGA module; gain control signals of the radio frequency front end amplifying circuit and the intermediate frequency VGA amplifier are provided through the FPGA module, the first AD conversion module and the second AD conversion module share one AD conversion chip, and a signal amplifying circuit is arranged at the front end of the AD conversion chip. The radio frequency automatic gain control circuit has the advantages that analog-digital conversion on intermediate frequency signals and RSSI signals is achieved through the same AD conversion chip, a hardware circuit of a radio frequency processing circuit is simplified, and the implementation cost of the radio frequency automatic gain control circuit is reduced.