Abstract:In view of the Gutenberg-Bullen average earth model and the integral Green’s function, load effects of ocean tide models on displacement at the GNSS continuous operation reference station along China’s coastline are calculated with the two China regional ocean tide models and global ocean tide model EOT11a. Furthermore, the root mean square (RMS) and root sum square (RSS) are comprehensive analyzed. The results show that most of the differences of horizontal displacement loading for the two models are in sub-millimeter, with millimeter magnitude for almost all the vertical displacement loading with a maximum of 5.8 mm. Meanwhile, the coverage area of Chinasea 2010 in the China Sea is larger than Naoregional 1999. There is a great difference between the two models in the Yellow Sea and the East China Sea, but in the Bohai Sea and the South China Sea the difference is small. As the differences among models are relevant to the station location and tidal wave frequency, we should compare the load correction of data and adopt the preferable model suitable for the particular studied areas.