Abstract: Magnetic drive pump cancels the structure of dynamic seal and uses magnetic drive technology. Unlike the seal structure of centrifugal pumps, magnetic drive pump completely avoids the hidden danger of the leakage of toxic or harmful substances through pump seal. Because of its specialty, it is particularly important to solve its problems in use. This article introduces the structural features and operating principle of magnetic drive pump, analyzes the operation of the pump in lubricating oil production unit, identifies the possible problems and reasons in different processes, and puts forward some corresponding measures against these problems, so as to guarantee the long-period and stable operation of the magnetic drive pump and satisfy the current needs of safe and environmental-friendly production

Key words: magnetic drive pump, seal, cavitation, countermeasure