An ABAQUS-based multiaxial creep fatigue prediction method, comprising the steps of: S1: establishing an ABAQUS finite element model and defining, by means of a user subroutine UMAT, a viscoplastic constitutive equation of a material to be tested (S1); S2: determining model parameters required for the viscoplastic constitutive equation (S2); S3: establishing a fatigue damage calculation model and a creep damage calculation model of the multiaxial stress and strain states of said material (S3); S4: establishing an ABAQUS finite element model in the multiaxial stress and strain states, and calculating stress and strain tensors of each cycle on the basis of the defined viscoplastic constitutive equation and the model parameters (S4); and S5: calculating an equivalent stress and an equivalent plastic strain by means of a user subroutine USDFLD, and on the basis of the fatigue damage calculation model and the creep damage calculation model and in combination with the stress and strain tensors, superimposing the fatigue damage and creep damage of each cycle by means of a linear cumulative damage criterion to obtain a crack initiation life (S5).
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