Horizontal pipe expander with efficient cooling mechanism

The invention discloses a horizontal pipe expander with an efficient cooling mechanism. The horizontal pipe expander comprises pipe expanding driving equipment, a first limiting piece and a main body, the cooling structure is arranged at the top end in the main body, air outlets are evenly and fixedly connected to one side of the top end of the main body, and the first limiting piece is fixedly connected to one end of one side of the top of the main body; a second limiting piece is movably hinged to the top end of the first limiting piece, preformed grooves are evenly formed in one end of the first limiting piece and one end of the second limiting piece, rubber pads are fixedly connected to one ends of the preformed grooves, and fixing structures are arranged on the two sides of one end of the first limiting piece. According to the horizontal pipe expander, pipe expanding parts are evenly installed on one side of the pipe expanding driving equipment, the pipe expanding driving equipment is started to drive th