Through the observation and analysis of the surface strata movement induced by 1101 hydraulic mining face in Caozhuang coal mine, the parameters of surface strata movement in hydraulic mining were obtained, and these parameters were compared with the ones in dry mining, finally a conclusion was drawn that under the same mining condition the coefficient of surface subsidence in hydraulic mining was obviously smaller than one in dry mining. The application of the studied results in the control of surface subsidence had reached obvious economy effect.