In this paper, we collected the continuous observed gravity data of Qiongzhong seismic station, and performed tidal and non-tidal analysis based on the processed data. Tide analysis was done by using VAV harmonic method and Non-tidal analysis was done by performing zero drift correction, solid tide correction, barometric pressure correction, and tide correction. Among them, the zero drift correction was done by the general polynomial fitting zero drift method, the air pressure correction was performed by VAV software, and the tide correction was done by using the SPOTL program to calculate the tidal load of Qiongzhong seismic by NAO.99b tide model. Finally, we obtained the non-tidal changes about the gravity of Qiongzhong seismic station. Our results show that the gravity pressure admittance of Qiongzhong Platform is -0.34×10^-8m/s²/mbar, the pressure correction range is about 10×10^-8m/s², and the tide correction range is about 5×10^-8m/s². After the above correction, the gravity non-tidal change data of Qiongzhong seismic station is weaker than the tidal signal in the gravity non-tidal change data after only zero drift solid tide correction. It shows that the effect of tide correction is obvious, and the tide signal can be further removed.