[Objective] We studied the effects of different mulching measures on the soil water, heat, salt, and soybean yield in the farmland, in order to provide a reference for promoting crop yield in the mountain terraces of Ansai County, Shaanxi Province.[Methods] The soybean(Zhonghuang 35) was used as the material where this experiment included four treatments:film mulching (M), mulching with 5 000 kg/hm² straw (J₅), mulching with 2 500 kg/hm² straw (J₂) and traditional tillage (CK).[Results] ① The soil water storage of M and J₅ treatments during growth stages were higher than that of CK treatment, except for the podding stage in the 20-40 cm soil layer. Additionally, the soil water storage of M in the seeding stage was higher than the J₅ treatment in each soil layer. ② In each 0-60 cm soil layer, the soil temperature of M was higher than the CK treatment, during the entire growth stage. The soil temperature of J₅ was lower than the CK treatment, except during the podding stage. ③ M treatment can improve soil conductivity in a certain extent. The conductivity has a significant difference between M and CK treatments (p<0.01) in the 0-20 cm soil layer. ④ The soybean yield of M and J₅ were significantly higher than that of the CK treatment, by 46.73% (p<0.01) and 34.61% (p<0.05), respectively. ⑤ There was a positive correlation between soybean yield and average soil water storage, soil temperature, and soil conductivity, during the entire growth period in a certain extent. Compared with other growth stages, the physical soil conditions had a significant effect on soybean yield during the seedling stage.[Conclusion] There is a significant positive correlation between soybean yield and soil water storage and conductivity, during the seedling stage. Therefore, film mulching can improve soil water storage and electrical conductivity during the seedling stage and promote soybean yield.