The bucket elevator of the system is an improved TD series bucket elevator, which has a larger conveying capacity. The machine is suitable for vertically conveying powder, granular and small pieces of bulk materials. Such as coal, sand, coke dust,cement and crushed ore, etc. GTD series bucket elevator has six specifications: gt400,td500, gtd700, gtd800, gtd1000.gtd1400. The double (four) rows of buckets are arranged alternately, and the multiple rows of buckets can be arranged appropriately, so as to increase the conveying capacity. The way of tension adopts the free tension of heavy hammer, which ensures the reliability of transportation.