[Objective] The soil respiration characteristics in terraced fields under different film mulching conditions in the loess area were studied, in order to provide scientific basis for exploring reasonable agricultural plastic film mulching measures of soil carbon cycle.[Methods] The study set up three treatments for experiments:bare land, white film land and black film land.[Results] ① The daily variation of soil respiration rate of corn fields with different film mulching conditions showed a single-peak curve trend, and the daily average value was as follows:black film land>white film land>bare land, and the soil respiration rate of different mulching treatments was significantly different. ② The change of soil respiration rate of the white film land and the black film land in different months was as follows:July > May > March > September > November. The change of soil respiration rate of the bare land in different months was as follows:July > March > September > May > November. The soil respiration activity in summer was very intense, and the soil respiration rate in different months of different film mulching conditions was significantly different. ③ The annual soil CO₂ emissions from the soil of different mulching films were as follows:black film land>white film land>bare land, and the annual CO₂ emissions from soil in summer and autumn were higher than those in spring and winter. ④ The soil respiration rate of different film-mulched corn fields had a good correlation with the surface temperature and 5 cm soil temperature, and both showed extremely significant correlations. The 5 cm soil temperature of the film-mulched corn field had a higher impact on the soil respiration rate than the surface temperature, and vice versa in bare land.[Conclusion] Under different mulching conditions, the soil moisture content from the surface to the deep layer changes in an S-shaped curve. The soil moisture in 0-60 cm soil layer was significantly lower in bare land than in the other two film-mulched land. Soil respiration rate and CO₂ release of soil respiration increased under different mulching conditions, which could effectively improve the soil carbon cycle environment of terraced land in loess area.