Splicing focal plane assembly

The invention discloses a spliced focal plane assembly, which comprises a focal plane box body, a detection CCD assembly, a star guide CCD assembly, a window assembly and a temperature control assembly, wherein t detection CCD of the detection CCD assembly is installed in the focal plane box body through a TEC assembly, the star guide CCD of the star guide CCD assembly is installed in the focal plane box body through a supporting seat, the detection CCD and the star guide CCD are arranged in a confocal plane mode, the star guide CCD and the detection CCD are cooled outside the focal plane box body through the heat pipe and the heat dissipation plate of the temperature control assembly, and the interior of the focal plane box body is heated by using an active heating loop, so that the pointing stability in long integral time is ensured, the jitter and displacement of a target on a pixel are eliminated, a space remote sensor can better adapt to a platform attitude control system, pointing instability caused by