In order to investigate on the effects of returning crop residual as mulch in addition to film mulching,field plot experiments were deployed in sloped lands of Jianping County,Chaoyang City,Liaoning Province.Five levels of residual returning(0,400,800,1 200 and 1 600 kg/hm²) were compared in terms of soil moisture retention and maize yield.The results show that the residual returning treatment of 800 kg/hm² exhibited the best effect on soil moisture retention.The yields of the lands with residual returning of 400,800,1 200 and 1 600 kg/hm² were 5 069.20,5 781.46,5 462.25 and 5 407.46 kg/hm²,with increases of 18.62%,35.28%,27.81% and 26.53%,respectively,in comparison of the control.The treatment of 800 kg/hm² also displayed the best influences on maize growth in comparison of the others,as indicated by the statistically significant difference.