Pipetting device for micro-fluidic chip

The invention relates to the technical field of automatic pathogenic microorganism nucleic acid, in particular to a pipetting device for a micro-fluidic chip, which comprises a rack, a pipettor and an injector. A liquid storage area and a working area are arranged on the rack, various solutions are stored in the liquid storage area, and a micro-fluidic chip is mounted on the working area. The pipettor comprises a mounting frame, a plurality of pipetting heads and a driving part, the mounting frame is mounted on the rack and reciprocates at the upper ends of the liquid storage area and the working area, the driving part is used for driving the plurality of pipetting heads to move, and any one of the plurality of pipetting heads moves towards the liquid storage area or the working area. The injector is connected with the pipetting head so as to control the pipetting head to suck or discharge liquid. Various solutions can be sucked through one-time movement of the pipettor and discharged to the micro-fluidic chi