Abstract:Gleditsia seed was used as the main raw material，the ratio of material to liquid，extraction temperature，stirring speed and stirring time were studied，the optimum extraction of Gleditsia plant gum was obtained by orthogonal experiment of four factors and three levels，the ratio of material to liquidwas 1 ∶20（g/mL），the temperature was 60 ℃，stirred for 90 minutes and the stirring speed was 24 r/min.The Gleditsia plant gums obtained under these conditions were prepared to coat freshly cut apples and potatoes with different concentrations and then refrigerated at 4 ℃.The sensory evaluation，weight loss rate and browning degree were used to validate the application effect of Gleditsia plant gum in film preservation，and to prove that Gleditsia plant gum could inhibit browning and spoilage of fruits and vegetables.This study provided a new idea for freshkeeping of freshly cut fruits and vegetables，it also had positive significance for the comprehensive utilization of Gleditsia plant gum.