Abstract: In order to reduce the damage of common plastic mulching film on soil and crop, field comparison tests were carried by covered with different oxo-biodegradable mulching films and their degradation effects, and the heat and moisture preservation were studied. The results showed that: the degradation rate and degree of the double degradable film were different and the order was A＞B1＞B2＞C＞CK. Degradation rate of A was the fastest and its degradation degree was the highest, up to 73.71% , the exposed part was completely degraded; degradable films could improve the same soil temperature as common plastic film before degradation and their effect of the heat preservation decreased even disappeared after disintegration period. Effect of moisture preservation of plastic film was not clear because of high temperature and rainy weather during the test. This experiment indicated the controllability and the thoroughness of the oxo- biodegradable mulching film which would make a good foundation for crop production in the future.