Abstract: Abstract:Residual film not only affects the crop emergence and yield but also causes serious soil and environmental damage and affects the smooth operation of the agricultural machinery, so residual film recovery is imperative. Ridge tillage residual film recovery has the same characteristics with the residual film recovery equipment, and it has higher requirements for ridge width of residual film recovery equipment. The plastic film has not been fully utilized and the ridge body is relatively high. Furrow residual film recovery is difficult and a lot of plastic films used can not be completely recovered. A lot of plastic films are buried very deep. As one of the key means to control plastic film residue pollution, mechanically collecting technique of plastic film residue has shown a good developing prospect. But, there are many problems in the existing residual film recycling machines, such as high rate of film wrapping, incomplete recovery of residual film, and so on. Shovel screen type plastic film residue collector has a recycling capacity to the film in soil. It has a good application prospect in the field of ridge tillage plastic film recycling. The high rate of film wrapping for plastic film transport mechanism and the high rate of soil content in residual film after harvest are the major problems in the promotion of shovel screen type plastic film residue collector. To reduce the high film wrapping rate and soil containing rate in residual film after harvest, and improve the working quality of plastic film transport mechanism, single-factor test was used to get the best form of the screen surface structure in this paper. The Box-Benhnken central composite experimental design principle was adopted on the basis of single factor experiment to research the working parameters of the plastic film transport mechanism of shovel screen type plastic film residue collector. The vibrating screen's vibration frequency, vibrating screen amplitude, and distance between jagged pieces were taken as 3 factors which influenced the working quality, and a three-factor and three-level response surface experiment was conducted. In the experiment, when the vibration frequency of vibrating screen was less than 2.3 Hz, the separation effect was poor; when the altitude of vibrating screen was less than 40 mm, the film conveying performance was poor; when the distance between jagged pieces was less than 8 mm, the separation effect was poor; when the vibration frequency of vibrating screen was higher than 4.3 Hz, the resonance phenomenon was serious; when the altitude of vibrating screen was more than 80 mm, the effect of separation was poor; and when the distance between jagged pieces was more than 20 mm, the residual film phenomenon was serious. Therefore, the vibration frequency of vibrating screen was selected from 2.3 to 4.3 Hz, the altitude of vibrating screen from 40 to 80 mm, and the distance between jagged pieces from 8 to 20 mm. The mathematical model of the response surface was established. And the influence of each factor on the working quality was analyzed and each factor was optimized comprehensively. The results showed that the significant effects of vibration screen frequency, distance between jagged pieces and vibrating screen amplitude on reducing the rate of film wrapping were in a decreasing order, and the significant effects of distance between jagged pieces, vibrating screen amplitude and vibration screen frequency on reducing the rate of soil content were in a decreasing order. The best work parameters were as bellow: when the vibrating screen's vibration frequency was 3.9 Hz, the vibrating screen amplitude was 42 mm and the distance between jagged pieces was 15 mm, the rate of film wrapping was 1.72%, and the rate of soil content was 32.81%. Through comparing the mathematical model and the experimental result, it turned out that the relative errors of all the property indices between the two were less than 5%, which meant that the model established was useful and could be used for prediction and optimization. The research results can provide the references for the plastic film transport mechanism of plastic film residue collector and the optimization of working parameters.