The utility model provides a heat exchanger heat exchange tube dismounting device, include: guide bar, the external diameter of guide bar are less than the internal diameter of the heat exchange tubewaiting to dismantle, and the length of guide bar is greater than the length of heat exchange tube, a location section of thick bamboo, location section of thick bamboo detachably cover is establishedin order to be used for the tip of butt at the heat exchange tube on the guide bar, turncap, turncap are selectively installed at the tip of a location section of thick bamboo or the tip of guide bar, and being close to of turncap is provided with the sawtooth structure on the terminal surface of guide bar. The utility model discloses a heat exchanger heat exchange tube dismounting device structural design is equitable, and one multi -purpose, can not destroy under the prerequisite of box and heat exchange tube in the assurance, removes it, separate, guarantees integrality of each part, and very big improvement work efficiency has avoided barbarous dismantlement, guarantees the normal operating of device equipment, avoids economic loss.