Abstract: After analyzing the PPP(precise point positioning) technology and the PPP position principle,PPP/INS coupling navigation model is proposed by introducing PPP to GPS/INS integrated navigation.The PPP/INS integrated navigation route is plotted and detailed data processing is shown.In order to carry on the fusion experiment,the PPP data which updates in 1 s and 2 s and INS data in 100 Hz are gathered in the University of New South Wales campus.The tests are discussed and analyzed in the paper to compare the performance of PPP and PPP/INS with RTK solution which is as the reference navigation.The results show the PPP/INS loose coupling navigation resolution is better than PPP.When the update period of PPP data is 1 s,the navigation precision increases by 24.17%(0.299 m),29.69%(0.253 m),35.14%(0.160 m) in X,Y,Z direction.When the update period of GPS data is 2 s,the navigation precision increases by 38.40%(0.475 m),21.01%(0.179 m),3.52%(0.013 m) in X,Y,Z direction.