The utility model discloses an accurate mixing arrangement of multichannel trace liquid, including chassis, carousel, control module, rotatory actuating mechanism and a plurality of micro - liquid extraction device of drive turntable, above the chassis was located the carousel, the carousel rotated with its vertical centering control axis, be equipped with a plurality of liquid mixing entry on the chassis, the terminal liquid mixing who inserts respectively rather than the one -to -one of liquid output of a plurality of micro - liquid extraction devices enters the mouth, be equipped with a liquid mixing export on the carousel, liquid mixing export below is equipped with mixed liquid collecting bottle, be equipped with a location infrared transmitting tubes on the carousel, be equipped with a plurality of location infrared receiving tube on the chassis, control module control actuating mechanism drive turntable is rotatory, control module control liquid is waited to mix in the output of trace liquid extraction device, and location infrared transmitting tubes and location infrared receiving tube are connected with the control module electricity. This device simple structure, small, the precision is high, has realized the non -contact multichannel trace liquid mixing that can on -the -spotly allocate.