Abstract: In view of the problems existing in the combined harvest of potatoes in China, such as short harvest period and the traditional mechanical cleaning methods that rely heavily on mechanical excitation for the separation of potato impurities, resulting in low efficiency, high skin breaking rate, and frequent mechanical failures caused by films and vines entanglement, this study proposes a non-contact pneumatic flexible potato cleaning technology. Traditional mechanical cleaning equipment mainly relies on physical contact sorting, which is difficult to handle the residual plastic films and vines during the mechanical harvesting process, intensifying the difficulty of manual cleaning and causing skin damage. Although the remaining films are usually processed by dedicated film recovery machines, long-term weathering can leave broken films in the soil, which are accidentally harvested along with the tubers, thereby intensifying the challenge of separation. Inspired by the wide application of pneumatic cleaning in crops such as rapeseed, corn and soybeans, this study designed a pneumatic vines and residual films removal device for potato machines, which is used after harvest and before storage. The main structure and working principle of the device were introduced in detail. The kinetic analysis of the materials entering the separation chamber and during the throwing process of the vibrating screen was carried out, and the lifting trajectory of the residual films was simulated to determine the key parameters affecting potato skin breakage rate and cleanliness rate. Under the condition of airflow velocity of 35 m/s, CFD simulation was carried out for the flow field at different height sections above the screen surface. CFD-DEM coupling simulation experiments were conducted under the conditions of feeding amount of 20 t/h, airflow velocity of 35 m/s, and vibration frequency of 5 Hz, and the simulation test results of 1.2 s, 3.8 s, and 6.0 s were analyzed. The coupling effects of vibration frequency and airflow at different velocity on the material lifting trajectory, stratification efficiency and demolding performance were studied. Taking the cleanliness rate and skin breaking rate as evaluation indicators, the parameter combination was optimized through single-factor and L9 (3⁴) orthogonal tests. Orthogonal experiments show that the primary and secondary factors affecting the cleanliness rate are airflow velocity, vibration frequency and feeding volume in sequence, while the order affecting the skin breaking rate is vibration frequency, feeding volume and airflow velocity in sequence. Under the conditions of a feeding rate of 20 t/h, a vibration frequency of 5 Hz, and an airflow velocity of 35 m/s, the cleanliness rate was 97.2% and the skin breakage rate was 0.98%. These results provide crucial technical support for the development of non-contact pneumatic flexible cleaning technology for potatoes, especially in optimizing the gas-solid two-phase flow dynamics of large irregular agricultural materials while minimizing mechanical damage. Meanwhile, the application of research methods such as CFD airflow and flow field simulation technology in production practice has promoted the application and development of computer measurement and control technology in agricultural mechanization and intelligence.