When the steel plate lifting tongs lift the steel plate, the steel plate tongs may be damaged due to the failure of a certain step of operation. Some friends said that his lifting tongs feel that they have not been used several times, and the tongue part of the tongs has a particularly serious wear phenomenon. Moreover, there is a certain degree of deformation of the pliers body. Later, it was analyzed that this phenomenon was caused by the steel plate not contacting the bottom of the jaws during operation. Such operation behavior not only easily caused the wear and deformation of the pliers of the pliers, but even caused The steel plate tongs come out from the steel plate and cause injury or death accidents to the staff, which should arouse our attention.