In order to study the distribution of airflow and construct the movement model of airflow velocity in traditional solar drying chamber, the numerical simulation of three-dimensional steady-state model was carried out to analyze the effect of wind speeds on the airflow distribution in drying chamber by using CFD software Fluent and the k—ε model. The results showed that compared with the airflow speed of 2m/s and 10m/s, the internal wind speed and airflow distribution were better when airflow velocity was 6m/s.