Abstract: The development of commercial transport aircraft standard model is an important support for developing advanced civil aircraft with independent intellectual property rights, as well as the verification of CFD technique and wind tunnel test quality. Combined with the layout characteristics and aerodynamic design requirements of mainstream wide-body commercial aircrafts at home and abroad, a standard model CHN-T2 for the wide-body aircraft is designed based on the self-developed design platform AMDesign. The design Mach number is 0.85, and the design lift coefficient is 0.48. The CHN-T2 model can fully represent typical geometric characteristics of mainstream wide-body aircraft, such as the twin-aisle fuselage, supercritical wing, horizontal/vertical tail wing, and wing suspension nacelle. CHN-T2 has typical flow characteristics such as strong interference between components, shock wave separation, boundary layer transition, etc. It also has excellent performance characteristics such as high subsonic cruise and high lift-drag-ratio aerodynamic efficiency. Aerodynamic shape optimization design, nacelle suspension component influence, Reynolds number effect and wind tunnel test are carried out in the present study. The results show that the cruising lift-drag-ratio of the CHN-T2 model reaches 21.8, the drag divergence Mach number is about 0.872, the buffeting boundary is greater than 1.3 times the cruising lift coefficient, and the quasi Reynolds number in wind tunnel tests is 3×10⁷. The CHN-T2 model has excellent aerodynamic performance and can be applied as an advanced aerodynamic standard model for wide-body aircraft. By continuously enriching the aerodynamic database and flow field images, the model can effectively support the analysis of flow mechanisms for wide-body aircraft, CFD technique verification and confirmation, advanced wind tunnel test technique development, and correlation research between CFD and wind tunnel test data.