On the basis of the visco-elasto-plastic rheological model of rock ， the rheological mechanical behaviors of rock mass with discontinuously weak intercalations are simulated by using 3D nonlinear numerical method. The elastic-plastic deformation and creep deformation were analyzed under different conditions. According to the numerical simulation results, the correlations among intercalation distance, intercalation length, intercalation angle and rock deformation are studied. The result shows that influencing factors of rock mass with discontinuously weak intercalations effect each other and there are close multiple correlations among them. Partial correlation coefficients can accurately reflect the interdependence of influencing factors and suit to be used as a dimension for quantitatively describing multiple correlations. The elastic  plastic deformation and creep deformation are close related to intercalation length ， intercalation thickness and intercalation distance ， and they are insensitive to intercalation inclination and rock bridge inclination.