Abstract: For the optimal control problem of induction motor in field-weakening control, the paper introduced the optimal current distribution method of induction motor in field-weakening region. The result of Matlab/Simulink simulation verifies the optimal current distribution method has better effect of field-weakening control than traditional 1/ωr field-weakening method. The field-weakening control of the optimal current distribution method is realized under experiment platform based on TMS320LF2407A, which proves field-weakening control effect of the method is better than the traditional field-weakening method.