In recent years, infrared detector technology has developed rapidly and is widely used in many fields such as national defense, meteorology, infrared remote sensing and aerospace. As one of the most important detectors in the mid-wave infrared waveband, InSb infrared focal plane detector has received much attention due to its high quantum efficiency, low dark current, high linearity of device response, good stability and high sensitivity. InSb focal plane detector is cost-effective and has outstanding advantages. Its rapid development has greatly improved the performance of the whole infrared system, involving in both military and civilian fields such as missile precision guidance, satellite early warning detection, airborne search and reconnaissance, infrared imaging and fire protection, medical treatment, power detection, and industrial temperature measurement. The research situation of InSb infrared focal plane detectors in developed countries is reviewed, and its development direction, prospect and trend are analyzed.