Abstract: For different metal materials, Charpy U-notch specimens and Charpy V-notch specimens were used to test the impact absorbed energy, and the shear fracture rate and lateral expansion value of the fracture of Charpy V-notch specimens were tested, the relationship between the impact absorbed energy test results of different notch forms and the relationship between the impact absorbed energy of Charpy V-notch specimens and the impact fracture performance were studied. The research results could provide technical support for the formulation of toughness test standards.