Abstract: The problem of residual film pollution is serious in the fields of Xinjiang，and the mechanical recycling of residual film is the main recycling method．However, few mechanism can be used to recover the plastic residue of the plough layer. The nail tooth type mechanism for collecting plastic residue can recover the plastic residue from the plough layer. Nail tooth type mechanism for collecting plastic residue is composed of roller, unloaded plate, nail tooth, end cap, handspike and cam, etc. When the mechanism for collecting plastic residue is operated, the nail tooth pick-up and tie the plastic residue when the nail tooth reach the position of film-brushing roller relative to the film-removing plate, the nail tooth retract relative to the film-removing plate under the cam operation, and the film-removing plate when the nail tooth reach the position of film-removing roller under the cam operation. Under the joint action of the plastic residue brushing roller, the plastic residue is unloaded into the film collecting box, to realize the function of side pick up and unloading. Through the virtual simulation technology, the trajectory of the nail tooth and the speed of the nail tooth are obtained. The nail tooth type mechanism for collecting plastic residue is a passive driving method, in which the cam, handspike, unloading plate and the nail tooth interact and the nail tooth is driven by the force of the nail tooth penetrating into the soil. The constraint between roller bearing and cam cannot simply be given a point-line constraint pair, but according to the actual situation, the contact constraint between roller and cam is added, which can better simulate the real motion. For nail tooth type mechanism for collecting plastic residue is passive power drive, and nail tooth movement is influenced by roller, and other moving reference frame, the nail tooth movement process of the theoretical calculation is difficult, lack of theoretical basis to carry out the nail tooth type mechanism collecting plastic residue working principle and dynamics analysis. By use of ADAMS, we completed kinematics analysis, and obtained the nail tooth relative to the movement of the ground, and the tooth curves of displacement and velocity. We also completed the prototype trial-manufacture and field experiment. Through analysis, When the nail tooth type mechanism for collecting plastic residue operates at a speed of 5 km/h, the rotational speed of the drum is 50.04 r/min, greater than the critical speed of roller 44.61 r/min, and nail tooth relative to the ground track for trochoid, nail tooth into the soil when the resultant velocity direction and vertical direction Angle was 18.1°. The out-earth combined speed paralleled the vertical direction, which is advantageous to the nail tooth into the soil and the smoothly picked plastic residue, meeting the design requirements. Marking points MARKER_76 and MARKER_77 on the tips of adjacent nail teeth were respectively 51.44 and 50.08 mm in length of collecting area when they were put into soil and excavated. The distance between adjacent cycloid lines at the same horizontal position was 59.4 mm, greater than the maximum picking area of 51.44 mm. Field experiments showed that the net collected rat of the deep layer of nail tooth type mechanism for collecting plastic residue was 71.7% and the wrapping rate was 1.52%, which can meet the performance requirements of the tillage residual film scavenging operation. The analysis results provide references for optimizing operation parameters and developing related equipment.