Abstract: Abstract: The harmonic constants of 170 tidal constituents at Zhongshan Station, East Antarctic are obtained from the tide data lasting from Feb. 2000 to Oct. 2005 using classic harmonic analysis method. Chi\|square test is applied to the residual, which demonstrates the disadvantage of the classic harmonic analysis.A higher interval of the tide data or a longer period of data is suggested to be adopted to improve the distinguishability of tidal constituents. Results of the harmonic analysis show that the tide type of Zhongshan Station isirregular diurnal tide. The main tidal characteristic value and engineering water level are also calculated.