The longissimus dorsi of pig was taken as a material in this experiment. The preserva⁃tives of 0 . 6% chitosan compounded with 0 . 25% Nisin and 0 . 6% chitosan compounded with 0 . 6% po⁃tassium sorbate were coated on the pork. Through the detection of the change of total numbers of colony under different temperature conditions, the effect of compound film coating solution on shelf life of meat was determined. The results showed that 0. 6% chitosan compounded with 0. 25% nisin and 0. 6% chi⁃tosan compounded with 0 . 6% potassium sorbate could extend the shelf life to 8 d and 7 d respectively at low temperature (0~4℃) . They both extended the shelf life longer than the control group. But at the room temperature (25℃) , the effect of prolonging the shelf life was not obvious.%试验以猪背最长肌为原料，用0．6％壳聚糖复配0．25％ Nisin、0．6％壳聚糖复配0．6％山梨酸钾进行涂膜保鲜处理，通过测定不同温度条件下菌落总数的变化，确定复合涂膜液对冷却肉货架期的影响。结果表明：在低温（0～4℃）条件下贮藏，0．6％壳聚糖复配0．25％Nisin可延长货架期到第8天，而0．6％壳聚糖复配0．6％山梨酸钾处理货架期可延长到7d，均较对照组有所延长；而室温（25℃）条件下，货架期延长效果不明显。
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