In order to determine the change degree of soil moisture response in vadose zone under the influence of the artificial recharge and clarify the characteristics of soil moisture movement, in -situ paddy field was taken as the research object, the relationships between soil moisture content, negative pressure,electrical conductivity and irrigation infiltration time,and buried depth along the profile were analyzed based on long-term monitoring data. The V-G model was used to fit the soil moisture characteristic curve, and the mathematical relationship between soil moisture and negative pressure was analyzed by SPSS. The results show that the variation laws of soil moisture content and negative pressure are obvious. The correlation between soil moisture content and negative pressure is good, and the correlation coefficient is above 88%. It is difficult to fit the soil moisture characteristic curve in single-layer buried depth, but a better fitting curve can be obtained in superposition of multi-layer buried depth. There is a sudden change in soil negative pressure with the change of moisture content, so the monitoring frequency should be further improved.