Abstract: Using the co-seismic response data from the DSQ water-tube tiltmeter and the VS vertical pendulum tiltmeter at the Ganzhou seismic center station in Jiangxi, we analyze the maximum response amplitude, the delay time and the continuous response time of the two instruments. The results show that: ① There is a positive correlation between the continuous response time and magnitude; ② There is a positive correlation between the delay time and epicenter distance; ③ Because of the differences of instruments design and observation principle, the recorded co-seismic response signals are different.