The aircrafts fly at both high altitude and fast airspeed in the air but needs slow airspeed in order to land safely. To increase aircraft fly efficiency, the material and design of wing inboard flap should be carefully engineered to provide aircraft with high speed flight in the air but keep strong lift with lower airspeed in order to safely land to the ground. The wing inboard flap is a critical part for the aircrafts and the previous researches showed that the damaged inboard flap can lead aircraft function failure and even cause fatal accidents in the flight and landing processes. Since the defects in wing inboard flap can cause potential safety hazards, the strong inboard flap materials and good inboard flap design to keep safe flight is very important. This paper studies and analyzes the nanocoated material applied in the design and development of aircraft wing inboard flap by using computer-aided 3D modeling, numerical simulation, and prototype experiment to improve current and future wing inboard flap design and development