Nowadays, aiming at the problems of packaging film scraping and incision deviation caused by the cutting mechanism in the fruitvegetable packaging machine, a cutting mechanism of fruitvegetable packaging machine based on the linkages and the cam mechanism was proposed. Firstly, the motion mathematical model of the cutting mechanism was established. Then, by using the virtual prototype of ADAMS, 〖JP3〗the parametric model of movement characteristics of cutting mechanism was completed according to these mathematic equations. And the influence of the main parameters of the mechanism on the movement of the mechanism were analyzed, including the link length of l1, l2, l3 and rise rotation angle β of the cam. Meanwhile, depending on the analysis method of sequential quadratic programming (SQP) algorithm, the optimal aggregative index could be obtained under the condition that l1 was 247mm, l2 was 154mm, and l4 was 1395mm. In this situation, the kinematic simulation analysis showed that the maximum value of acceleration of the lower cutter was 7.971mm/s2, and the cutting distance was 20.4mm. Finally, based on the above simulation and analysis, the prototype was processed with the optimized parameters. And the prototype test using the PVC film cutting rate as the main indexes was carried out. The results showed that the cutting rate was above 98% for the PVC film with thickness of 11μm, 12μm, 13μm, which indicated that the cutting mechanism could satisfy operation demand of the fruitvegetable packaging machine.