Positioning device for mechanical part machining

The utility model relates to the technical field of machining of mechanical parts, in particular to a positioning device for machining of mechanical parts, which comprises a shell, a feeding pipe, a first motor and an electric telescopic rod are sequentially and fixedly connected to the upper portion of the shell from left to right, a rotating disc is fixedly connected to the tail end of a main shaft of the first motor, and a discharging hole is formed in the inner side of the rotating disc. A supporting plate is fixedly connected to the inner side of the shell, a guide table is fixedly connected to the upper end face of the supporting plate, a fixing plate and a fixing block are fixedly connected to the lower end face of the rotating disc, a rotating rod is fixedly connected to the front end face of the fixing plate, a connecting rod is rotatably connected to the outer side of the rotating rod, and a pressing plate is rotatably connected to one end of the connecting rod through a rotating shaft. And the othe