Abstract: The aim is to discuss the actual role of degradable film in corn production in southeast Shanxi. Degradation speed, degradation strength, water storage and heat preservation of three types of films were investigated in the field, with different covering time. The results showed that compared with bare land, two degradable films significantly increased soil temperature and soil moisture, the effects were inferior to that of the common film. The difference was not significant between the two degradable films. The corn growth period of degradable films and common film reduced by 4 days and 9 days, respectively, and the production increased by 9.06%, 9.72% and 14.54%, respectively. The difference of yields between common film and degradable film was not significant. Degradation period of the two degradable films was consistent. The degradation started at 40-50 days after mulching, and the degradable film disappeared at 90-100 days after mulching. It indicated that the two degradable films had obvious both biological and economic effects. They not only met the environmental conditions of corn growth, but also saved labor and time and decreased the environmental pollution. Therefore, degradable film instead of common film has feasibility for corn production in southeast Shanxi.