The invention discloses a method and a device for picking high-quality dark brownish green. The method comprises the following steps: firstly, rotating a hobbing blade, pocketing the dark brownish green to be picked into a sorting toothed slot, then cutting off the dark brownish green by a hobbing type cutter and a fixed blade, and throwing the dark brownish green which is cut off into a dark brownish green collection device by the hobbing type cutter so as to realize the cutting and the collection of the dark brownish green. The invention adopts a mode of combining the hobbing type cutter and a fixed-face cutting blade and enables the mode of cutting the dark brownish green to be similar to hobbing, and the hobbing type cutter can throw the dark brownish green which is cut off into a boxbody under a situation of self rotation because the cutting direction is the same as the throwing-out direction of tea leaves, thereby enhancing the picking efficiency effectively, avoiding the loss caused by the shatter of the dark brownish green in the picking process, utilizing sorting teeth to guide the cutting of the dark brownish green during cutting, reducing the picked old peduncles and the picked old leaves of the dark brownish green greatly and enhancing the picking quality of the dark brownish green.