Infrared focal plane array device inevitably exists bad pixels due to the impact of manufacturing materials technology and other factors which may reduce the image quality and affect the detection probability and false alarm rate of the system.In this article analysis is made to the characteristics of the bad pixels and their generating mechanism.An algorithm for detecting bad pixels by analyzing multiple frames of the image is presented.The simulation results show that this method is simple reliable and easy for implementation.Finally median filter is used to compensate the bad pixels detected.