Each time you use the safety belt, you should check the label and certificate, check whether the nylon belt has cracks, whether the suture is secure, and whether the metal parts are missing, cracked and rusted. The safety rope should be hung on the connecting ring for use. The safety belt should be hung high and used low, and prevent swinging and collision, avoid sharp substances and contact with open fire. The hook and loop of the safety belt shall be firmly hung on the tie-down point during operation. When using the seat belt in low temperature environment, pay attention to prevent the seat belt from becoming hard and cutting.