The LS68 cup-type current meter is widely used. It belongs to the medium and low speed instrument. We should pay attention to the adjustment of sensitivity and signal quality when we testing and maintaining. We should pay attention to anti-rust and troubleshooting during routineSmaintenance. This paper introduces the technical points of maintenance for LS68 cup-type current meter, analyzes the causes of various faults and puts forward solutions, which provides reference for the verification and use of the current meter, and ensures the formula of the current meter is stable and reliable.