The weak target detection system requires high detection sensitivity and high spatial resolution,so as to realize the stable detection of weak targets,accurate positioning of targets and fine resolution when accompanying multiple targets.Photoelectric tracking and aiming system is generally divided into two stages:target acquisition and target tracking.In the target acquisition stage,due to the deviation of velocity estimation,when the target flies at high speed,if a long integration time is used for detection,the phenomenon of target energy crossing pixels is prone to occur,and it is difficult to improve the signal to noise ratio of target detection.In order to solve the problem of low detection sensitivity caused by high speed target movement,high speed weak target detection and tracking technology based on sliding window pixel binning is proposed in this paper.Pixel binning mode improves the detection sensitivity and detection stability in the initial acquisition stage.After the tracking system completes the stable tracking of the target,long integration time and high resolution mode can be used to complete the detection of the target with high sensitivity and high resolution.In this paper,the SNR enhancement effect of pixel binning mode is analyzed.The analysis shows that the pixel binning mode is conductive to improving the signal to noise ratio and detection stability of high speed weak target detection.