InSb infrared focal plane array assembly, which composed of PV InSb array, Si CMOS readout, micro dewar and micro cooler, has been developed. The FPA assembly achieves a high performance with mean detectivity 1×10 11 cmHz 1/2 W -1 , quantum efficiency ～72%, non uniformity ～16%, and operability ～99.5%. The assembly specifications meet the requirement for missile guidance, and out door staring imaging detection has been demonstrated successfully.