Abstract: Aiming at the problem of the high labor intensity of trimming peach branches in summer, according to the technical requirements of peach canopy trimming, a single-sided reciprocating trimming device for the canopy was designed based on AIP software. Performance was tested in the field. The test results show that the reciprocating canopy plastic trimming device has a working speed of 0.37 hm~2/h when the traveling speed of the unit is 1.8 km/h and the distance between the moving blades is equal to 5 cm, and the missed shear rate of the branches within the trimming width is 7.5%. The fracture rate is 9.1%, which provides a basis for the mechanical light and simplified plastic pruning of the peach canopy.