Each layer of the telescopic cantilever shelf can be shaken out of the use of hand, single hand shake out 5 tons of steel, each cargo space separate shake out operation use, there is no order between the layer and the layer, lifting is also, after shaking out the crane to the use of the site, save time and improve work efficiency. Material classification shelf storage workshop storage environment becomes better, storage capacity is also improved, more convenient for users, managers more worry. The total storage capacity is 60 tons, which is divided into 6 layers for storage. There are many kinds of display, and the number is clear and easy to check.