The overloading of the group crane electric hoist is an important factor to reduce the work efficiency, and it will also reduce the service life of the group crane electric hoist. Therefore, the group crane electric hoist is strictly prohibited from being overloaded. To truly ensure that the group hoist electric hoist is not overloaded, you need to have an understanding of the weight of the object to be lifted, and make sure that the lifting capacity of the group electric hoist is above the weight of the object to be lifted. And the parameters of each group hoist electric hoist must be the same. The selection of group hoist electric hoist requires a correct calculation of the weight of the object to be hoisted. Generally, the total rated lifting weight of the selected electric hoist is 1.3-1.5 times the overall weight of the oil tank. After determining the number of electric hoists for group cranes, it is necessary to calculate and determine the spacing of the lifting points. The spacing of each lifting point must be equal and the points are evenly distributed. When using the group hoist electric hoist, it is necessary to adjust the number of intermediate shutdown inspections according to the lifting height of each floor and the construction progress. Normally, during normal operation, each layer of operations will be shut down for 2-3 inspections. If the height of the storey is increased, the number of shutdown inspections will be increased appropriately. The layers adjacent to the capping not only need to increase the number of intermediate shutdown inspections, but also timely monitor the operation of the electric hoist, because with the increase of the total load, the probability of overload operation of the electric hoist also increases.