By combining the field-weakening control principles of interior permanent magnet synchronous motor (IPMSM) with the space vector pulse width modulation (SVPWM), a novel field-weakening control strategy for IPMSM was proposed. The difference between the reference voltage updated by current regulator and the saturated voltage output by SVPWM is used for field-weakening control, which modifies the stator current phase angle. The d and q axis stator reference current component is redistributed, and finally, the speed operation range of IPMSM is extended. With this method, high-time speed field-weakening operation was realized, and the smooth transition of field-weakening stator current and fast response were also guaranteed. Moreover, since the proposed method utilizes the dc-link voltage more efficiently, it makes the motor generate higher output torque and has better adaptability in field-weakening operation region than conventional field-weakening control methods under the same voltage and current limitation. The effectiveness of the proposed field-weakening control method was verified with simulation and experimental results.