In order to solve the problems of poor profiling effect, easy congestion, unsatisfactory film collecting and unloading performance of the existing collector machine for corn whole plastic film mulching on double ridges, the improved design of part of profiling elastic tooth and film rolling device of the machine were carried out. The profiling teeth were made up of a plurality of single articulated film tooth and camshafts. Each single articulated film tooth can be modeled individually, and the two adjacent film teeth were arranged in space under the action of camshaft, so as to solve the problem of poor local copying ability, the soil and interference of cuddle film. The film rolling device was made up of driving roller, driven roller and curl-up film roller with variable diameter. Among them, relying on the manual pull rod and the built-in spring, the outer contour diameter of curl-up film roller was achieved. The optimized movable blade can ensure that its outer contour was a closed cylinder through the engagement of the inner and outer teeth. And the outer ring of the driven roller was installed with the conveyer teeth, so that the whole roll film device can operate more smoothly in the work, and the curl-up film roller with variable diameter can always keep in contact with the driving roller and the driven roller. It avoided the phenomenon that the curl-up film roller with variable diameter stayed on the top of driving and driven roller because of the sudden change of friction force. By analyzing the assembling, throwing and dropping process of the eccentric gear roller, the minimum rotation speed of the eccentric gear roller was determined to be 164.92r/min. Combined with orthogonal test, taking the recovery rate of plastic film, wrapping rate and soil content as evaluation indexes, the synthetical scored method was used to obtain the order of influence of significant parameters on comprehensive performance of each index when the machine was working as: the forward speed of the machine, reverse scraping diaphragm velocity, eccentric pick film roller velocity and the camshaft velocity. The field experimental results showed that the recovery rate of residual film was 90.26%, the film wrapping rate was 1.94% and the soil content was 25.41%, when the machine speed was 3km/h, the conveyor roller velocity was 140.4r/min, camshaft velocity was 130.6r/min, eccentric pick film roller velocity was 183.6r/min and reverse scraping diaphragm velocity was 120.8r/min. The results met the technical requirements of residual film recovery in corn double ridges furrow and provided a reference for the design of residual film recovery equipment.