The invention discloses a heat dissipating pipe extruder. The heat dissipating pipe extruder comprises a frame, a clamping mobile platform, an extruding cylinder and a hydraulic power system; the frame includes a back end frame, and a stand arranged at the front end of the back end frame; the stand is provided with a hydraulic system, an oil pump motor set and an oil tank; the clamping mobile platform is mounted on the back end frame in the connecting place between the stand and the back end frame; the extruding cylinder is arranged at the front end of the clamping mobile platform; a mobile support is arranged at the front end of the extruding cylinder; one side of the extruding cylinder is connected with the hydraulic power system; the extruding cylinder includes a cylinder body; the back end of the cylinder body is connected with an end flange through a bolt; and the front end of the cylinder body is connected with a cylinder barrel through a bolt. During machining, a pressure head mounted in the extruding cylinder can extrude out six uniform pits in the diameter direction of a seamless steel pipe; and dense pits can be formed in the surface of the extruded seamless steel pipe, so that the in-pipe liquid circulating area and the out-pipe heat exchange area can be largely increased, and the excellent heat dissipating effect is achieved.