Abstract: Degradable mulch utilization is an important approach to solve agricultural“white pollution”. The authors studied the effect of premature fracture of degradable mulch on soil temperature, moisture and corn yield. The results showed that premature fracture had different effects on soil temperature and moisture in different stages. The effect on soil temperature mainly reflected in seedling stage, the soil temperature of degradable mulching field decreased by 14.1% comparing with that of PE film mulching field in 25 cm soil layer. The effect on soil moisture mainly reflected in bell stage, soil moisture of degradable mulching decreased by 13.1% comparing with that of PE film in 100 cm soil layer. Crop parameters such as plant height, bald tip, ear rows, hundred kernel weight and yield of degradable mulch treatment were significantly lower under that of PE film treatment, which caused the yield reduction of 27.2%. Therefore, the premature fracture of degradable mulch affected soil temperature, moisture and yield significantly.