According to the situation of Compass navigation positing system that the accuracy of Compass standard point positioning is 10m(1σ), the difference technology of Compass is presented to improve the positioning accuracy, so that the high accuracy positioning system can be realized and the accuracy of difference positioning is validated. The experiment results indicate that the positioning accuracy of Compass pseudo difference is better than 2m (1σ), and positioning accuracy of carrier phase difference is better than 3cm (1σ).