Storage cage, butterfly cage, also called warehouse cage has a fixed capacity of store items, stacked neatly and stored at a glance, easy to the inventory, at the same time improve the effective utilization of warehouse space. In addition, the products to be reused, strong and durable, convenient transportation and storage enterprises can effectively reduce the manpower cost and packaging cost. This product not only can be used in factory production workshop, and can be used in the supermarket as show promotion and storage, and can be used in outdoor. Improved storage cage can be put in shelves, assembly line, can also be stacking: wheeled storage cage can be convenient and quick turnaround in the workshop, storage cage with PVC board or iron plate can prevent small missed.