Abstract: To further study the effect of different environmental protection films, cultivation experiment of maize with common plastic film, degradable mulch film and liquid film covering were done under fieldconditions with open field cultivation as control. The effect of different films on maize growth and development, yield and component factors were determined. Results showed that the degradable mulching film significantly improved the seedling emergence rate of maize, which was 5.0% higher than that of open field control (0.05 difference); increased dry matter accumulation, the plant height, stem diameter and leaf area, promoted the ear growth, shortened bald tip, increased kernel number per ear, 1000 grain weight, and the yield was 40% higher than that of control (0.05 difference); the effect of the degradable mulch film was similar to that of the common plastic film. However, the liquid film had little effects on maize seedling, dry matter accumulation, plant height, stem diameter, and leaf area, although to a certain extent increased maize yield, which was only 0.5% higher than that of open field control, and the difference did not reach significant level.