After two years of use, the safety belt shall be subject to spot check according to the situation of batch purchase. The static load test shall be carried out for the fence belt and the impact test shall be carried out for the safety rope. If there is no crack, the safety rope can continue to be used. The unqualified products shall not be used. The safety rope sampled must be replaced before it can be used. When replacing the new rope, pay attention to adding a rope sleeve. The safety belt should be stored in a dry and ventilated warehouse. It is not allowed to contact with high temperature, open fire, strong acid, strong alkali and sharp hard objects, and it is not allowed to be exposed to the sun. Do not use tools with hooks and thorns when moving, and prevent sun and rain during transportation.