According to the lysimeter data of Groundwater Balance Test Station of Changji, Xinjiang from 1992 to 2015, this paper discusses the hysteresis phenomenon in the process of infiltration recharge and analyzes influencing factors on infiltration recharge of groundwater. According to the precipitation recharge coefficient, we studies the change law of precipitation infiltration replenishment with groundwater depth and determines the optimal depth of unconfined groundwater and stable depth of different strata. The results indicated that the optimal depth point of sand gravel stratum and fine sand stratum are 0.5 m, and the optimal depth of light clay stratum is 0.0 m. Precipitation infiltration replenishment decreases along with the increase of depth of unconfined groundwaterand and tends to become stable. The stable groundwater depth is 6.0 m. An exponential experience formula between precipitation recharge coefficient and depth of unconfined groundwater is established based on the optimal depth and stable point.