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In order to accurately describe the transport mode of soil moisture in arid areas, based on previous studies, the model parameters and specific boundary conditions were determined according to the actual situation of Shihezi Reclamation, and a two-phase mass and heat flow transfer model including water and air was established fit for this vadose zone-saturated zone, thereby simulating the dynamic changes of soil moisture, soil temperature. The measured soil temperature, soil moisture were used to test models. The results showed that the simulated soil temperature and moisture could well reflect variation of measured values. Accuracy assessment indicators showed that the simulation accuracy of each soil layers was high. Simulated results of the model considering the impact of air were closer to the measured results. For the day rainfall of 9.7mm, infiltration depth could affect soil moisture of about 20cm depth for coupling model, and up to about 30cm depth for a single model. The average evaporation rate of the model considering air in the rain day was 7.7% more than the result of the model without considering air. In the day right after the rainfall event, the results without considering the effect of air pressure caused evaporation rate 3.19% lower than the results considering air effect. Calculating the total evaporation during the simulation period, the results of the two models were very close. But based on the results of water balance analysis of the two models, comparing calculated evaporation and simulated evaporation, the results of the model considering air influence were considered reliable.