The utility model discloses a raw cotton foreign fiber rejects with binary channels shortwave infrared imaging system, including infrared camera lens, beam splitting device, shortwave infrared imaging device, comprehensive data processing device, control module, power module, the data transmission device of seeing through of shortwave, the shortwave is infrared to be connected with shortwave infrared imaging device through camera lens and spectroscope, and comprehensive data processing device passes through the data transmission line and is connected with shortwave infrared imaging device, and data transmission device transmits the cotton shortwave infrared imaging device 1 who catches for control module. The utility model discloses an integrated dual waveband of camera gathers, and system stability is good, and the reliability is high, installation convenient to use, the detection precision is high, can detect out different fibres such as polypropylene and polyethylene fiber in the raw cotton that conventional visible light and ultraviolet imagery can not detect out etc. The high efficiency of cotton letter sorting is effectively guaranteed to high line frequency, high SNR, it is small, the low power dissipation.