Daily necessary maintenance tasks can reduce wear and tear, eliminate hidden dangers and faults, maintain good technical status of equipment, prolong service life, reduce operating costs, and ensure the safe and reliable operation of the line. Maintenance content technology includes eight words: "cleaning, fastening, adjusting and lubricating". Cleaning is to open and close the machine appearance, internal and brake wheel circumference, electrical contacts, electromagnet suction surface and surrounding environment, regular cleaning. The doors and windows of the hoist room should be cleaned once a week, and the instruments should be tidy and tidy in time. Fastening threaded pipe joints are fastened in hydraulic systems and sealing cap bolts to prevent leakage from loosening; flanges and other positioning bolts, high strength bolts, fastening bolts and wire rope sling connection bolts are fastened on foundations, such as the force of the parts and the moving connection, and hidden dangers and accidents.