In order to investigate the effects of different plastic film mulching method on soil moisture and yield of spring maize in arid area, the comparative experiment of plastic film type and plastic film mulching mode was carried out. Four kinds of film mulching methods, such as whole black film, half black film, whole white film and half white film and uncovered（CK）, were set up to study the differences of soil moisture content, water use efficiency,chlorophyll and yield under different plastic film mulching methods. The results showed that the water retention performance of whole film mulching was significantly higher than that of semicircular film mulching, and the effect of whole black film mulching on soil water retention of spring maize farmland was higher than that of whole white film mulching. Compared with the control group, the yields of whole black film, black half film, whole white film and white half film increased by 41.6%, 21.5%, 26.8% and 17.2%, respectively. The crop water use efficiency increased by 22.53%, 5.66%, 9.99% and 2.01%, respectively. Plastic film mulching treatment can preserve soil moisture in northwest Hebei Province, which has a significant effect on improving grain yield and crop water use efficiency of spring maize, and whole black film mulching has the best effect.