Analysed the drying characteristics of white seedless grape under the conditions of air temperatures（30～45 ℃） and air velocity（0.5～2 m/s），and obtained the available moisture diffusion coeffi-cient and drying activation energy. Finally, non-linear regression analysis was used to develop four common agricultural thin layer-drying models based on the data, and these models were evaluated by coefficient of determination (R²), root mean squared error (RMSE) and chisquare value (χ²). Results: The available moisture diffusion coefficient were rising with the growth of air temperature and air velocity. The drying activation energy (E_a) is calculated to be 22.95 kJ/mol according to Arrhenius formula. According to the statistical parameters from four kinds of models, such as determination (R²), chisquare value (χ²) and root mean squared error (RMSE), the Parabolic model can well predict the moisture change law during drying process of white seedless grape. The results could provide a theoretical basis for white seedless grape drying production.