An aviation large field of view(FOV) infrared scanning device employs TDI-CCD detector and performs a complete appliance scanning manner, its imaging quality is influenced by aircraft yawing rotation. The scanning device line of sight(LOS) rotation equation and LOS rotation constraint equation were established through kinematic analysis. Thus the aircraft yawing rotation bound was obtained which allowed a distinct image quality. Simulation was carried out on actual flight data, it shows an excellent image quality when aircraft makes a straight flight. The aircraft yawing rotation influence to large FOV scanning is acceptable.