This invention is a crimp head quick-change structure of a crimping tool that enables a crimping tool to quickly replace crimp heads of various specifications. The operating theory of the crimp head quick-change structure of a crimping tool is to utilize: a first crimp head protrusion and a first blocker back section notch pushing each other combines with a first crimp head notch and a first head pushing each other to cause the first crimp head to lodge at first clamp section.