Abstract: In order to solve the problem of plastic film residue collection after cotton harvesting, a machine combining chopping field cotton straw with collecting plastic film residue was designed. The whole structure and working mechanism of the machine were introduced, the main operation components of the machine were designed and finally the structure parameters were determined. The processes of straw chopping and plastic film collection were analyzed and the conditions to chop straw of disk-saw blade were achieved. Experiment results indicated that under the condition of the operation speed of 5-5.5 km/h, the length of chopped straw was less than 20 cm, the plastic film residue collection rate of the machine was more than 90%. Plastic film residue and straw could be effectively separated after the operation, and the plastic film residue was uncovered with small amount of damage. The machine has advantages of high operation efficiency, low energy consumption and stacking in bulk of the collected plastic film residue and can be used to collect the plastic film residue after cotton harvesting.