In the application of permanent magnet synchronous submersible motor, the operating condition need strict requirements on the motor control strategy. For example, the ratio of torque to speed is precisely controlled in the program of load starting and the constract pressure water supply keeps the outlet pressure stable through the change of motor speed. The paper analyzes the working characteristics of load starting and constant pressure water supply of submersible motor and builds the corresponding mathematical modle; The feedback correction in predictive control is derived in detail; According to the infuence of the weights in the system on the predicted output, a control strategy based on fuzzy prediction technology is proposed. Finally, establishing the model of loading start and constant pressure water supply with the real engineering data on Matlab/simulink. The resuts show that the fuzzy prediction technique proposed in the paper could optimize the dynamic response of permanent magnet synchronous submersible motor, effectively reduce the static oscillation and enhance the stability of water pressure recovery in constant pressure water supply.