This paper introduces the concrete idea of receiver optimization design. Its main function is to convert the echo signal by the two down-conversion process, get the intermediate frequency signal, and then the intermediate frequency signal amplifying and filtering processing, signal power stability in AGC control, and ultimately by the signal processing combination of AD transform and digital filter processing. The traditional microwave receiver and intermediate frequency receiver are optimized and integrated, and the function of the receiving channel is modularized, and the reliability and maintainability are improved.