Abstract: The experiment results show that，under the film dropping on hill,arid winter wheat is able to form good seeding before winter,each growth period from emergence to heading came before the proper time and ear differentiation became longer,which made the number of grains per ear increase by 2.1 compared with control.During the grains filling period,the photosynthetic rate was significantly higher than that of other treatments,the 1000-grain weight increased by 0.4g and yield increased by 24.8 percent.This is significantly different from control.Therefore,the potential of increasing wheat yield is effectively raised.