The suspender shall wear a shoulder type safety belt and buckle it on the D-ring of the safety belt to fix the lifting appliance on the top of the container when it rises from the walking car. After the lifting appliance on the four corners of the top of the container is fixed, it shall be hooked on the main hook of the crane respectively. The suspender shall return to the ground from the walking car, unhook the safety belt, clear the space for the personnel under the lifting route, carry out the container lifting and hoist the container After the height is about 30 cm, suspend it first, confirm that the lifting appliance is in a stable and normal state, lift the container to a designated place and put it in place, and remove the lifting appliance from the container with the same protective measures.