Taking the recording data of FSQ water tube tiltmeter at Lanzhou deformation station as research object, analysis on the data with methods of configuration analyzing, curve fit, remainder analyzing, dynamic analyzing of tide factor, tide ellipse and tide slanting angle is done, from both non-tidal part and tidal part of recording. The relationship between abnormities in the data and medium-strong earthquakes in regions near the station is researched also. The result shows that the records of FSQ water tube tiltmeter at Lanzhou deformation station has good medium-short response to earthquake occurred in neighboring regions.