The utility model relates to a
plasmid extracting and blending device which is provided with a
plasmid plate placing
station, a steel needle device is arranged on the side of the
plasmid plate placing
station, and the steel needle device is arranged on a lifting device and a translation device; a plurality of steel needles are uniformly distributed in the width direction of the plasmid plate placing
station in the steel needle device; the steel needle is a thin hollow
pipe and is vertically arranged downwards, the lower part of the steel needle is an aspiration port, and the upper part of the steel needle is connected with the extraction pump device through a pipeline; and a cleaning tank is arranged near the plasmid plate placing station and is connected with a cleaning liquid
barrel. According to the utility model, the steel needle device is connected with the extraction pump device, so that the uniform mixing operation is realized by sucking and
spitting a
reagent, and the speed of sucking and
spitting the
reagent by the steel needle can be adjusted, the time of sucking and
spitting the
reagent by the steel needle can be controlled and the uniform
mixing effect of plasmids can be controlled by setting and adjusting an extraction drive, so that the full uniform
mixing effect can be ensured; and meanwhile, the driving device is utilized, automatic operation is achieved, and the operation efficiency is greatly improved.