The invention relates to a magnetic pump, which comprises a support bracket, a motor, an outer coupler which is driven by the motor, an inner coupler which is concentrically provided with the outer coupler and is driven by the magnetic force of the outer coupler to rotate, a separation sleeve which is arranged between the outer coupler and the inner coupler, a pump shaft of which one end is connected with the inner coupler, a blade wheel which is installed on the pump shaft, a pump casing which is located on the outer portion of the outer pump shaft and is fixedly connected with the support bracket, and a sliding bearing and a trust bearing which are concentrically provided with the pump shaft. The surfaces of the pump casing, the blade wheel, the inner coupler, the pump shaft, the separation sleeve, the sliding bearing and the trust bearing are coated with polyetheretherketone resin, or the blade wheel, the separation sleeve, the pump shaft, the sliding bearing, and the trust bearing are made from polyetheretherketone resin, which can greatly increase the use field and the use temperature of the plastic magnetic pump, reduces the friction resistance and energy consumption in working, avoids elements from deforming, and increases the service life.