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As an auxiliary equipment in the clean room, the transfer window is mainly used for the transfer of small items between the clean area and the clean area, and between the unclean area and the clean area, so as to reduce the number of doors in the clean room and minimize the pollution in the clean area. The transfer window is widely used in micro technology, biological laboratories, pharmaceutical factories, hospitals, food processing industry, LCD, electronics factories and other places that need air purification. It is mainly used for the transfer of small items between clean areas and clean areas, and between clean areas and unclean areas, in order to reduce the number of clean room doors and reduce the pollution of clean rooms to a minimum. The transfer window is made of stainless steel plate, smooth and smooth. Two doors interlocking each other, effectively prevent cross-contamination, with electronic or mechanical interlocking device, and equipped with ultraviolet sterilization lamp.