The magnetic centrifugal pump adopts the push-pull magnetic circuit structure to realize the contactless transmission of torque, so that the variable seal is static seal and the corrosion resistant centrifugal pump without leakage is achieved. The flow parts of the pump are plastic, which is called plastic magnetic centrifugal pump; The use of stainless steel and other metal materials called metal magnetic centrifugal pump. The magnetic centrifugal pump is mainly composed of the pump body, impeller, magnetic coupling, isolation sleeve, motor, etc., installed in the seal body composed of the pump body and isolation sleeve, the motor drives the outer magnetic steel, the outer magnetic steel drives the inner magnetic steel connected with the impeller to rotate, so that the dynamic seal is static seal, to achieve no leakage of the chemical medium.