Existing residual film recovery machines for the cultivated layer struggle to achieve an efficient separation of plastic film from impurities during operation. To address this challenge, a wind-separation-type residual film recovery machine equipped with a cross-flow fan was designed. Through theoretical analysis and field tests, the optimal operational parameters were determined. In this paper, with the recovery rate and impurity content of the residual film were taken as the test objectives, with the air inlet angle, fan speed, and the proportion of residual film quality as the test factors. The response surface diagram was drawn with design-expert software, and the optimal parameters of the fan device obtained by orthogonal test range analysis and variance analysis were that when the air inlet angle was 31°, the fan speed was 1277 r/min, and the residual film mass accounted for 62%. Under these parameters, the residual film recovery rate was 88.1%, and the impurity content was 3.7%, which met the operational requirements of residual film recovery, and the research results could provide a basis for the recovery of residual film in the tillage layer.