The invention provides a motor operation control method based on discrete current vector phase-amplitude coordination. The motor operation control method is characterized by meeting three different control requirements for phase-amplitude coordination control in the motor operation process, the first requirement is to take output torque maximization as a goal, the second requirement is to take torque pulse minimization as a goal and the third requirement is to take position deviation minimization as a goal. The phase angle and the amplitude of current vector are respectively subjected to coordinated control. The control method adopts the following devices: a phase-amplitude coordination control module, a current control module, a power circuit, a motor, a position detection module and a current detection module, wherein one end of the phase-amplitude coordination control module is connected with the current control module, and the other end of the phase-amplitude coordination control module is connected with the position detection module; the current control module is connected with the signal control terminal of the power circuit; the output terminal of the power circuit is connected with the motor through a wire which penetrates the current detection module; the current detection module is further connected with the current control module; the position detection module and the motor are coaxially mounted.