The work aims to ensure that the PMSM can respond quickly when changing speed and load, and at the same time reduce its torque ripple and switching frequency in steady state, so as to make the permanent magnet synchronous motor more efficient and energy-saving in the packaging process. The advantages, disadvantages and common points of DTC and PIPC of PMSM were analyzed. The DTC control strategy was adopted to ensure the response speed of PMSM in the process of starting, changing speed and changing load, and then switch to PIPC control strategy in the steady state to reduce the torque ripple and power loss of PMSM. The simulation results showed that the two control strategies could achieve smooth switching, and the motor had fast dynamic response speed, strong anti-interference ability, small torque ripple in steady state and low switching frequency. Compared with DTC, in no load, light load and heavy load, the torque ripple was reduced by 30%, 12.5% and 2.4%, the switching frequency was reduced by about 45%; compared with PIPC, the response speed was improved by about 7%. Compared with single control strategy, hybrid control algorithm DTC_ PIPC combines the advantages of the two control strategies, so that the motor can respond to all kinds of sudden changes quickly in the whole motion process, and reduce its torque ripple and switching frequency in the steady-state operation.