Abstract: Multipath has a great influence on GPS receiver. The principle and realization of GPS receiver are researched. A GPS Multipath Platform is designed with the use of FPGA develop board of xc3s1000. To meet the requirement of Multipath, Verilog HDL language is used to design feedback shift register which generates C/A code and starting pulse. There are five modules including phase shifting, attenuation, add module and code loop integral correlator, which solves some key techonologies and problems and realizes store, transfer of the data.