Abstract: The degradation rate of vitamin C(Vitamin C)and storage conditions were studied in storage of Castanea henryi. In the study, three main cultivars of Castanea henryi were dipped in Imazalil, and then stored at three different temperatures (-1～0℃, 5℃, 10℃). The concentration of vitamin C was detected and the results showed that the degradation rate of vitamin C was proportional to the concentration of vitamin C. The degradation rate coefficients k was obtained with nonline fitting. The method of range analysis and variance analysis was to analyze the degradation rate coefficients k of vitamin C. The results of the experiments show that the best storage conditions are at -1～0℃, Changmang in cultivars and 2000 μL/L in Imazalil concentration.