Abstract: The effects of notch depth on the tensile strain energy, notch sensitivity coefficient and tensile fracture morphology, and the effects of notch angle on the tensile strength and plasticity of notched specimens were investigated through notch tensile tests and notch deflection tensile tests with different notch depths on V150 drill pipe material. The results show that V150 drill pipe material has strong resistance to notch embrittlement while having high strength, high toughness and high plasticity. The tensile strength of the notched specimens increase with the increase of notch depth, and the notch sensitivity coefficient is greater than 1, which is insensitive to notch; with the increase of notch depth, the post-fracture elongation, post-fracture shrinkage, and total strain energy of fracture decrease gradually; the macroscopic morphology of fracture change, from cut-off type to positive fracture type, and the microscopic morphology changes from tough fracture to tough fracture and quasi-dissociative composite fracture; when the notch depth is 0.5 mm, the skew angle intensifies the brittleness tendency of the notched specimen, which gradually decreases the plasticity, and when the notch depth is 0.8 mm,the fracture shrinkage decreases to 15%-20%.