The goal of this study is going to shorten the drying time ,improve the quality and reduce the energy consumption of Chinese prickly ash for its vacuum drying. Weibull distribution was adopted to analysis the drying kinetics characteristics of Chinese prickly ash for its Scale parameter α, Shape parameter β, Moisture Effective diffusion coefficients D_eff and Geometric factor R_g under the varied drying conditions of vacuum (0.02,0.04,0.06

Mpa) and temperatures(50,60,70℃). And the quality of dried product was investigated by Weight Grade Method. The result showed that there is a positive correlation between drying time and vacuum(V) and drying temperatures(T); The value of β ranged between 1.3369 and 1.6132, the values are closed to 1 and that means the drying curves obeys the exponential distribution. The values of D_eff are 0.715×10^-8m²·s^-1~2.244×10^-8m²·s^-1, and the value of R_g under varied drying conditions are closed to 1,and that means the model of D_eff have a good fitness. The average value of E_a is 24.36Kj.mol^-1. Besides, the color of the product was significant affected by drying temperature,and there was a positive correction between breakage rate and vacuum, drying temperature.