Abstract: Aiming at the shortcoming of uneven temperature distribution in the vacuum drying oven,combined with the theory of cargo porous media,a three-dimensional model of the drying oven is established.FLUENT is used to perform numerical simulation analysis on the temperature field in the existing drying box,and the temperature field distribution characteristics in the box are obtained.The k-ε model and the SIMPLE algorithm are used to simulate the temperature field in the drying box.The simulation results show that when the flow rate is 2.5 m/s,the layer height is 100 mm,and the tube distance is 100 mm,the temperature field distribution in the drying box is relatively uniform.The hot water flow rate has the greatest influence on the temperature distribution characteristics.In order to verify the reliability of the simulation results,a comparative verification analysis was carried out by combining the simulation results and the experimental results,and the average absolute error was within 3%,which confirmed the accuracy of the current simulation results.