Positioning device for fastening screw of piston connecting rod of automobile engine

The utility model discloses a positioning device for fastening a screw of a piston connecting rod of an automobile engine. The positioning device comprises a supporting seat plate, the assembling support is fixed on the supporting seat plate, and a large cushion block and a small cushion block are fixed on the assembling support; the large-end pin rod is fixed on the large cushion block of the assembly support, the large-end pin rod corresponds to the large-end hole of the piston connecting rod, and a pressing structure is further fixed at the tail end of the large-end pin rod; and the small-end pin rod is fixed on the small cushion block of the assembly bracket and is positioned under the large-end pin rod, and the small-end pin rod corresponds to the small-end hole of the piston connecting rod. The positioning device is simple in structure, the piston connecting rods can be quickly positioned in batches, and screws on the piston connecting rods can be conveniently and quickly tightened. 本实用新型公开了一种汽车发动机活塞连杆螺