Abstract: In this paper the results of Dang Chang Deformation station measured by FSQ——type water tubetiltmeter during 1990.7~1994.3 was introduced. The dynamic performance of the results is analysed.The results show that the mean square error of hour's reading values is less than 1×10^-3"; the monthlyvariation range of tidal factors of O₁ and M₂ wave is less than 6%. Among the drift curve, there are threecomponent parts, namly:long series tendency component, annual variation component and residual component. The variational speed rate of the tilt vector in the long period component is 1.5"/a, and the direction towards S11°E. After 1992, there is an obviously anomaly in the non-tide residual curve. During1993~1994 the variation speed rate of the residual vector is 0.5"/a, and the direction toward N36°E.