Aimed at the defect of likely deterioration of browning in packaging and storing process of fresh cut yam, by adopting single factor test and orthogonal test, an optimal ratio of composite yam was researched by soaking liquid treatment with laboratory salt, white sugar and white vinegar. Three kinds of modified PE film were used in fresh-cut yam packaging to study the preservation effects of different modified PE film. The results showed that the yam preservation effect was optimal when packed with PP/PE film and soaked 15 min in the compound impregnated solution containing salt, sugar and white vinegar with mass fraction of 0.6%, 0.4% and 0.4% respectively.