The different doping methods of La-TZM alloy plate were studied by observing and comparing the fracture and structure. The effect of La2O3 and La(NO3)3 on tensile properties and elongation of TZM alloy was discussed. The results show that the tensile strength of La2O3-TZM alloy plate is 1057 MPa and the elongation is 8.2%, while the tensile strength of La(NO3)3-TZM alloy is 1202 MPa, and the elongation is 7.0%. La(NO3)3 doped TZM alloy plate has finer second phase, and it makes the strength even higher, but lower the elongation.