Abstract: As a very important part of satellite navigation and positioning, the accuracy of the receiver position calculation directly affects the positioning accuracy. In this paper, Using BeiDou ephemeris data and pseudorange information collected by NovAtel receiver to verify the classic algorithms used in the position solution process of BeiDou receiver, including the BeiDou satellite position solution algorithm and the leastsquare receiver position solution, and performing the calculations and analytical verifications. The results show that the threedimensional error of the satellite position calculated by the algorithm provided by the BDS spatial signal interface control file is less than 10 meters. The threedimensional error of the receiver position calculated by the leastsquare method is less than 5 meters, and the accuracy of the official performance specification is satisfied. This results verify the correctness and feasibility of the algorithm.