In order to solve the problem of easy browning of peeled Chinese yam, the sugar or alkali solution was used to soak the peeled Chinese yam, and the best soaking solution was obtained according to the browning degree of the Chinese yam. According to the results of single factor experiment of sugar alkali compound soaking solution of pre-treating the peeled Chinese yam, the peeled Chinese yam was packaged with the biogas-conditioning cling film, the lily cling film and the ordinary PE cling film respectively. The preservation effects of different cling films on Chinese yam were studied through the chromatic aberration, hardness, weight loss rate and the total number of colonies of performance measurement. The results showed that 9% sucrose solution and the pH value of 9 alkali solution achieved good color preservation effect, and biogas-conditioning cling film performed good preservation effect on Chinese yam as well.