Theoretical equations by analyzing earth pressure balance(EPB) shield cutterhead¢s cutting the ground are deduced and the numerical model is set up. The simulating test platform and two simulating tests of two different types of cutterheads are introduced,and the torque of the cutterhead of the simulating EPB shield 1 800 mm in diameter is calculated according to the simulating experimental. Furthermore,the torques of the cutterheads of some domestic and those of overseas earth pressure balance shields are compared;and the computational results are verified with the field data. As a result,the equation of the torque of the cutterhead of EPB shield is proposed. It shows that the accurate result can be achieved according to the theoretical analysis and equations. The result can provide reference to practical engineering projects.