The research results of a medium wave 2048×256 infrared focal plane detector assembly for hyperspectral applications are introduced,in this paper.The medium wave 2048×256 infrared focal plane detector is spliced from two single medium wave 1024×256 infrared focal plane detectors,which adopts a non-vacuum sealed detector package structure integrated with hyperspectral camera.The test results show that the medium wave 2048×256 infrared focal plane detector assembly has normal functions and excellent performance.