Abstract: The experiment was carried out by three treatments of degradable films （B）,kind of ordinary films （C）,and none-films （ck）,and discussed the effect of degradable films on temperature and moisture of soil, yield and agronomical characters. The two years results are as follows, degradable films has reached the level 7 （50% ground is not visible to the naked eye film） degradation speed before tasseling stage; B and C had obvious effect on soil moisture conservation from 3 leaf stage to tasseling stage, and had equivalent effect on soil moisture conservation from Before sowing stage to 3 leaf stage for 0-20cm soil layer, however, with the degradation rate of acceleration, the effect was diminishing; B and C had obvious effect on raising temperature for 0-10cm soil layer in May, and showd B 〉 C;Compared with ck, B and C improved maize plant height, ear height and harvest index, and speeded up the development process. In the end, B and C can effectively increased by an average of 15.09% and 16.63%,173.54￥and 196.58￥ per mu, but Compared with the ordinary films ,the degradable films saved workers and time, and reduced the pollution of the environment.