A high-efficiency broadband receiver based on broadband matching network is designed in order to solve the problems of intermodulation interference, blocking and saturation caused by strong electromagnetic interference at the front end of RF signal receiving system. The operating frequency of the receiver module covers the entire S-band, and it adopts a 4-wire SPI interface to complete link control according to the instruction of the host computer. The 7th-order Butterworth low-pass filter design is utilized to ensure the best flatness and port standing wave ratio in the band. The measured results show that the receiver module realizes signal amplification and down-conversion of 100?kHz-6?GHz, and outputs with intermediate frequency of 140?MHz and 100?kHz-19.999?MHz. It bears the internal and external 10?MHz reference time base automatic switching function. This module provides a single-ended 10?MHz clock for baseband board for baseband digitization. It shows that the optimized design of the RF receiving front end can achieve high selective tracking and pre-selection of signals in the target detection frequency band, so that the receiving system can effectively suppress the strong interference signal.