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The maintenance of equipment is the objective requirement of equipment operation. "Machines have to be scrubbed regularly," Marx said. Here is a kind of additional labor, without this additional labor, the machine will become unable to use. "(Marx Engels collection volume twenty-fourth page 194) equipment used in the process, due to the material of equipment operation and chemical action, changing and inevitably will produce technical condition of abnormal phenomenon, and the loss caused by human factors, such as loose, dry grinding brush, corrosion etc.. This is the hidden danger of equipment. If it is not handled in time, it will cause premature wear and even serious accidents. Good equipment running conditions, can take preventive measures, avoid undue losses. Practice has proved that the service life of the equipment is largely determined by the degree of maintenance.

Therefore, the maintenance work of the equipment must be carried out strictly, and strict supervision and inspection should be carried out. Workshop, equipment and maintenance personnel should focus on the maintenance work, emphasizing the "prevention first, support" as the basis".