Outer diameter shrinkage equipment for casing pipe type joint

The utility model relates to the technical field of hole shrinkage equipment, in particular to outer diameter shrinkage equipment for a sleeve type joint, which comprises a base, a hollow plunger hydraulic cylinder, a hole shrinkage die and an end support structure, the reducing die is arranged at the end part of a piston pipe of the hollow plunger hydraulic cylinder; the end supporting structure comprises a supporting part fixed to the base and a pressing part arranged on the supporting part. One end of the sleeve type joint to be subjected to diameter shrinkage is pressed and fixed on the supporting part through the pressing part, and the other end of the sleeve type joint to be subjected to diameter shrinkage faces the side where the hollow plunger hydraulic cylinder is located and is fixed in the diameter shrinkage die. When the piston pipe of the hollow plunger hydraulic cylinder pushes the casing type connector to be subjected to diameter shrinkage outwards, diameter shrinkage can be conducted on the ca