Fracture toughness testing device for shaft parts

The utility model discloses a fracture toughness testing device for shaft parts. A universal testing machine base is provided with a supporting base; the supporting column is arranged at the top of the universal testing machine base; and a universal testing machine force loading rod is arranged above the supporting column. The fracture toughness testing device for the shaft parts is simple in structure, an existing universal testing machine can be utilized, the supporting base connected with the at least two supporting columns is arranged on the base of the universal testing machine, the force loading rod of the universal testing machine is arranged above the supporting columns, and the fracture toughness of the shaft parts can be tested. When the toughness of the shaft part needs to be tested, a fracture toughness sample of the shaft part is placed on the supporting column, and the shaft part is pressed down through the force loading rod of the universal testing machine, so that rapid detection of the fractu