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The equation of state of Nd2Fe14B has been calculated up to 150GPa based on the adding volume principle and the Gruneisens model.Meanwhile, the tiny element of bone is ignored, and the weighted average mass of the residuals, corresponding to their mass percentage, is taken as a total mass of the system.Through comparing these theoretical Hugoniot with known experimental one within the pressure range of 19GPa~78GPa, it is satisfactory with well matched D-u and P-V relations.In view of the above, the equation of state and the shear modulus of Nd2Fe14B are all together predicted to a higher pressure stage.