Abstract: The cumin grains, due to their small particle size and similar external dimensions, face significant challenges during the cleaning process. The absence of specialized cleaning devices has resulted in a high impurity content rate and low cleaning efficiency. To address these existing problems, a wind-screen type cumin cleaning device was designed. This design was based on the unique physical characteristics of cumin seeds and the working principles of existing cleaning devices. The study focused on the design of key components of the cleaning device, which encompassed the structural design and parameter design of the composite double-deck sieve, the cross-flow fan, and the wind blocking and intercepting device. To ensure the effectiveness of the design, gas-solid coupling simulation technology was utilized. This technology allowed for the analysis of the pressure distribution of the scavenging flow field, the airflow velocity law, and the solid-phase movement law of the scavenging materials. Through this simulation, the reasonableness of the device structure design was verified. During the simulation process, it was found that the main factors affecting the scavenging effect were wind speed, vibration frequency, and air inlet angle. These factors were then taken as the test factors, with the loss rate and impurity rate serving as the evaluation indexes.To further investigate the relationship between the independent variables and the scavenging effect, a quadratic polynomial response surface regression model was obtained through an orthogonal test of the three-factor and three-level. This model enabled the identification of the optimal working parameters of the scavenging device. The optimal parameters were determined to be a wind speed of 10.27 m/s, a vibration frequency of 4.07 Hz, and an inlet angle of 20.26°. To validate the optimal parameter solving results, a homemade test stand was utilized. The working parameter combination was tested, and the results were impressive. The average loss rate and impurity rate after cumin seed cleaning were 3.40% and 5.28%, respectively, and the theoretical prediction value was close to the test results, which proved that the regression model had a high degree of accuracy.Furthermore, the design of the composite double-deck sieve played a crucial role in achieving these results. The sieve's structural design and parameter design were carefully considered to ensure efficient cleaning while minimizing loss. The cross-flow fan and wind blocking and intercepting device also contributed to the overall effectiveness of the cleaning device.In conclusion, the wind-screen type cumin cleaning device designed in this study has proven to be an effective solution to the challenges faced during the cleaning of cumin grains. The device's design, based on the unique physical characteristics of cumin seeds and the working principles of existing cleaning devices, has resulted in optimal working parameters that minimize loss and impurity rates. The use of gas-solid coupling simulation technology has further validated the reasonableness of the device structure design. The successful validation of the optimal parameter solving results through the homemade test stand demonstrates the practical application and effectiveness of the designed cleaning device.