Using Multisim software to visually simulate and analyze the wireless communication receiving system, it mainly builds a complete system of AM wave receiving and demodulation. Through the parameter setting in the unit circuit, it is ensured that the weak AM wave signal can be further amplified, received, processed and demodulated. Through simulation, deepen the understanding of the basic principles of the unit circuit, and use different simulation tools to compare and analyze the index points of the high-frequency small-signal amplifier circuit, the local oscillator, the mixer circuit, the detector circuit, and the low-frequency power amplifier circuit, in order to build the receiving system Provides concrete and feasible ideas.