(1) Submersible pumps should be installed in sturdy baskets and then placed in water, and a solid protective fence can also be set up in the water around the pump. Pump should be erected in water, the depth of not less than 0.5m, shall not be used in silt containing water. (2) submersible pump into the water or proposed water, you should first cut off the power, no pull of the cable or the outlet pipe. (3) submersible pump should be installed to protect zero or leakage protection device, work within 30m of water around the pump, no one, livestock into. (4) before the start of the inspection project should meet the following requirements: a. Ligation of solid water; b. Deflated, drain, oil plug screwed are tightened; c impeller and water section without debris; d cable insulation good. (5) Turn on the power, the first test run, and should check and confirm the correct direction of rotation, outside the water running time shall not exceed 5min. Wear electrodes (6) should always observe changes in water level, the impeller center to the horizontal distance should be between 0.5 ~ 3.0m, the pump shall not sink into the sludge or exposed water. The cable shall not be rubbed with the wall of the well or the wall of the pool. (7) a new pump or a new sealing ring, after 50 hours of use, should be open to open the sealing plug seal, check the water, oil leakage. When the amount of leakage exceeds 5mL, 0.2MPa pressure test should be carried out to find out the reasons to be ruled out, should be checked once a month; when the amount of leakage does not exceed 25mL, you can continue to use. After the inspection should be replaced by the provisions of the lubricating oil. (8) The oil-immersed submersible pump repaired shall be subjected to 0.2MPa pressure test first to check that there is no leakage in all parts, and then lubricating oil is added to the upper and lower casings. (9) When the temperature drops below 0 ℃, after stopping the operation, the submersible pump should be prepared from the water and stored in the room after it is dry. (10) The insulation resistance of the stator winding of the motor shall be measured once a week and its value shall not decrease.