The invention discloses a hoisting device for mechanical processing. The device comprises a base, universal wheels, a concave-opening seat, a bolt, a locking nut, a rotating plate, a lead screw, a chuck, a handle, an outer pipe, an inner pipe, a locking part, a cross bar, a rack, a gear mounting rod, a gear, a belt and a first motor. According to the device, the hoisting is mechanically carried out, so that the defect of manual hoisting in the background technology can be avoided; the universal wheels enable moving; the handle can be rotated, and the chuck sucks the ground to avoid slipping; the gear is driven to rotate through the first motor, and the rotating gear drives the rack to move, and thus the height of the whole device can be adjusted; the inner pipe slides in the outer pipe torealize supporting; a second motor drives a first steel cable to enable a lifting rod to slide up and down, and thus the height of the whole device is adjusted; a part is clamped through a clamping device, and the clamping device is hoisted through a coiling motor to realize hoisting assembling; the clamping device is of a plurality of structures for replacing in order to hoist the parts with different specifications.