Noise processing method in the course of digital image stabilization for single channel-controlled air defense missile was studied. Through analyzing the reason and characteristics of image noise, firstly model of glint noise and fluctuating noise was established based on the analysis of basic process of missile digital image stabilization, afterward, image stabilization model on the consideration of imaging noises was constructed. On the basis of the model, denoise algorithm based on the wavelet was proposed, through which local characteristic of signal was kept and imaging noise was cut down effectively. Simulation experiment validates the algorithm can effectively cur down noise.