Abstract: This paper mainly studies the basic principle of PN code ranging technology and the implementation of a single point static wireless positioning method based on PN code ranging technology for the targets in space. The core modules include carrier separation and demodulation, PN code acquisition and PN code tracking, etc. MATLAB is used to simulate the system scheme to verify the rationality of the scheme, and Verilog language is used in Modelsim software to simulate the generation of pseudo-random sequence, carrier modulation, carrier separation and demodulation, and PN code synchronization. Based on the design idea of software radio, the scheme of the wireless positioning system hardware platform based on PN code ranging technology is designed in the 2.4 GHz frequency band.This paper adopts theoretical research, simulation and actual testing to research and realize the PN code ranging technology, collects and records test data, analyzes the actual test data, and provides data reference for subsequent program improvement.