Due to the structural particularity of Sichuan-Chongqing strata, cuttings produced during drilling are easy to deposit and form cuttings beds, which makes it difficult for cuttings to migrate and eventually lead to major downhole accidents such as stuck pipe and drilling tool fracture. In order to improve the rock carrying capacity of shale gas wells, a new type of aluminum alloy drill pipe was proposed. Through the analysis of the rock carrying principle of the new aluminum alloy drill pipe, it was concluded that the drill pipe could not only improve the cuttings transport capacity, but also reduce the friction and drilling hydraulic consumption. Then the mechanical analysis and modeling of the drill pipe were carried out, and the floatability of the drill pipe was verified by using the actual parameter calculation. The whole process of cuttings settlement and discharge was analyzed, and the whole process of cuttings settlement and discharge was divided into five stages. Finally, under the full consideration of the interaction between drilling fluid, cuttings particles, drill pipe and borehole wall, the precise simulation of rock-carrying process of the new aluminum alloy drill pipe was carried out by using CFD-DEM coupling. Changing drilling fluid displacement, drill pipe speed, cuttings particle size, drill pipe eccentricity, the ability of new aluminum pipe with rock was analyzed, and the drill pipe with rock efficiency was compared with traditional steel pipe.The CTR (cuttings transportation rate)of the two kinds of drill pipe was studied. Finally it is concluded that the new aluminium alloy pipe has a higher efficiency with rock compared with the traditional steel pipe. The result is of great significance to reduce the settlement of cuttings and improve the ability of cuttings migration.