Abstract: Abstract: Plastic mulch technology is an important mean to promote agricultural production efficiency and increase income of farmers. As increase of using mulch plastic film in agriculture production, recover and recycling of the film become an issue. So there is an urgent need for an efficient and reliable technique of mechanical recovery of residual film to solve the problem of increasingly serious pollution of arable land caused by the debris of mulch film. 1LSM-1.5 roller type residual film recycling machine is a typical waste plastic mulch film recycling machine, with arc reciprocating film picking drum as core device. This device has a problem of improper matching of working parameters.When the machine operated, because of the uneven of user's operation level, and the improper structure design of the machine, the overall performance of residual film recovery is affected resulting in reduction of recovery rate of residual film. Recovery rate of residual film is an important index of overall performance of roller type residual film recycling machine. From the process of picking plastic mulch film of arc reciprocating picking-up device, the effect of plastic mulch film collection and the rate of recovery of residual film are related to many factors. According to the structure and working principle of the roller type residual film recycling machine, in this study, the working mode of arc reciprocating picking-up device and the trajectory characteristics of film picking tooth were analyzed, Through the analysis, we determined the main factors affecting the performance of equipment, they were plastic mulch film pick up device rotational speed, the machine advance speed, and the embedded depth of film picking tooth. Orthogonal test was used to analyze and determine the main factors affecting the performance of machine. Taking film pick-up device rotational speed, the machine advance speed, and embedded depth of film picking tooth as the experimental factors, with residual film picking rate as test indexes, we determined the significance, priority, and order of factors and at the same time, analyzed the influence of each test factor on the change trend of recovery rate of residual film. The results showed that the optimum level combinations of selected parameters to obtain the best working conditions for the machine were 45 r/mine for the film pick up device rotational speed, 4 km/h for the machine advance speed, and 35 mm for the embedded depth of film picking tooth. With such this optimum working parameters, the equipment residual film collecting rate was 88.2%. The residual film recovery machine achieved design standards, and the residual film recovery rate was 6.2% higher than that of the current straw combined residual film recovery machine. The above research can provide data reference for the optimization design of residual film recycling machine in order to protect the farmland ecological environment.