Connecting structure of excavator arm and breaking hammer

The utility model discloses a connecting structure of an excavator arm and a breaking hammer, which relates to the technical field of underground excavation tunnel construction, and comprises a first connecting hole, a second connecting hole and a third connecting hole which are correspondingly formed in the positions of a first bending part, a second bending part and a third bending part; the first supporting plate and the second supporting plate are installed on the same side face of the component body in parallel, a first through hole is formed in the first supporting plate, and a second through hole is formed in the second supporting plate. A first bolt penetrates through a first mounting hole and a first connecting hole in the end part of the excavator arm; the end of the telescopic rod is fixedly connected with the supporting plate assembly through a second plug pin, a third plug pin is installed in a second installing hole and a second connecting hole, a fourth plug pin is installed in a third installi