The lifting chain requires rust protection. The rust of the chain seriously affects the service life. The maintenance of the lifting chain is very important and cannot be ignored. The surface of the lifting chain is very easy to oxidize, but because the environment is uncertain, there are corrosive substances in the use environment, so once these substances are adsorbed to the surface of the chain, causing damage to the surface layer, which causes the entire chain to be suffered by the entire chain. Damage, so it needs to be regularly maintained on the lifting chain in order to discover the processing problem in time and extend its life. The lifting chain can choose different surface treatment when choosing to achieve a certain rust protection.