Automatic hoisting device for large casting

The automatic hoisting device is characterized in that a lifting assembly is arranged on a supporting assembly and comprises a lifting lead screw and a lead screw seat, the lifting lead screw is inserted into the lead screw seat and is in threaded fit connection with the lead screw seat, and a hoisting seat is arranged at the bottom end of the lifting lead screw; at least two sets of stroke grooves are formed in the side wall of a shell of the hoisting base, supporting blocks are slidably arranged in the stroke grooves, the top end of a driving rod is connected with a lifting lead screw, a guiding block is fixedly arranged at the bottom end of the driving rod, the lifting lead screw drives the driving rod to ascend, and the guiding block ascends along with the driving rod and drives the supporting blocks to extend outwards from the shell. The mounting base is driven by the lead screw assembly, and lifting is stable. A guide block is arranged at the bottom end of a driving rod in the hoisting base, guide slope