Based on observation data from three kinds of ground tiltmeter at Yichang Seismic Station (water tube tiltmeter, VP vertical pendulum tiltmeter, and VS vertical pendulum tiltmeter), China, tidal response functions, non-tidal parameters, and seismic responses were compared. Results showed that:(1) the M₂ wave tide factor for three kinds of tiltmeter in the N-S direction was generally smaller than that in the E-W direction, because the former was easily affected by the local observation environment. Tide rates of three kinds of tiltmeter in the E-W direction were slightly larger than those in the N-S direction. The daily drift of the VS tiltmeter was the largest, followed by that of the VP tiltmeter and the water tube pendulum. (2) The three kinds of tiltmeter were all easily influenced by the observation environment. The data generated different noise, and the performance difference of the three instruments caused synchronous observations. To distinguish the real information of crustal deformation, interferences in the observation data should be removed in order to mutually verify the physical quantities.