Through this study in the refrigerator to install ultraviolet light-emitting diodes (leds), using the wind circulation of refrigerator indoor air sterilization, purify the food storage environment. This article selects the fresh spinach, leeks in storage in a freezer with ultraviolet sterilization module, through the determination of chlorophyll, Vc content, soluble protein, verify that the research for the effect of preservation of vegetables. Experiments show that the installation of ultraviolet sterilization module refrigerator will slow down the spinach and leek chlorophyll content, to reduce the loss of 10.1% lower than in the ordinary refrigerator storage samples with 9.4%; Can slow the Vc loss of spinach and leek, during the storage period is common in the refrigerator of sample 1.91 times and 1.67 times; Can reduce the spinach and leek soluble protein content, to reduce the loss of 13.2% lower than in the ordinary refrigerator storage samples with 17.9% ?