Abstract: The effects of 3 kinds of oxidation biological double degradable plastic film, common plastic film and uncovered with film on the growth and yield of Jinxiang white garlic were studied. The preservation of heat and moisture and degradation property of different degradable mulching film were surveyed. The results showed that: the difference of plant height, plant weight, stem diameter, single leaf area and fresh bulb weight of different treatments was not significant. The bulb yield of No.3 treatment was the highest (28932.75 kg/hm2). Because of low temperature and freezing injury, the bulb yield of open field was 17.53% of the average yield of plastic film mulching treatments. Soil temperature in 5 cm and 15 cm soil depth of mulching treatments could be significantly increased compared with no mulching treatment, and soil moisture content of 10 cm soil depth could also be increased, the deep soil temperature could be significantly increased particularly with film mulching. There was no significant difference between biodegradable plastic film and ordinary plastic film. Among the three degradable plastic films,“Degradation No.1” had the best degradation effect, whose maximum tension and elongation at break dropped to 0 at mature stage. The elongation at break of “Degradation No.2”and“Degradation No.3”dropped to 102.83% and 360.28% at mature stage.