Abstract: According to the data of 24-year original orbit and 6-year interleaved ground track from Topex/ Poseidon(T/P), Jason-1 and Jason-2 satellite altimeter, we performed the harmonic analysis of tide on the offshore area of Zhejiang and obtained the harmonic constant of 8 principal constituents (Q₁、O₁、P₁、K₁、N₂、M₂、S₂ and K₂). The tidal harmonic constants of the satellite orbit crossing point show that the RSS of 8 tidal error synthesis in the original orbit, interleaved orbit, original and interleaved orbit crossing point are 3.16cm, 7.02 cm and 5.54cm, respectively. We show that the root-mean-square error of important tides of M₂、S₂、N₂、K₁ and O₁ are 4.32cm, 3.64cm, 1.97 cm, 2.61cm and 1.83cm, respectively, by comparing the tidal distribution information from satellite altimeter and 31 inshore tide stations at 21 tide stations. The vector root-mean-square error of multi-point of M₂ and S₂ tides at the contrast point are about 11cm and 8cm from our results and previous numerical simulation results. In the end, this thesis presents a more precise and up-to-date cotidal chart of 5 major constituents (M₂、S₂、N₂、K₁ and O₁) on Zhejiang inshore and offshore areas.