The invention discloses a tea stalk separating device. The tea stalk separating device comprises a supporting plate, a rotating shaft, a rolling drum, a cover plate, a telescopic column, a material receiving box, a separating cartridge, a dust suction pipe, a first draught fan, a deslagging opening, a plurality of air outlets, a bearing, a second draught fan, an electrostatic adsorption plate, a discharging port and a motor. According to the tea stalk separating device, the net-shaped rolling drum is installed on the outer portion of the rotating shaft in a sleeving mode, the multiple air outlets are formed in the middle of the rotating shaft, therefore the rotating shaft can drive the rolling drum to move when the rolling drum works, the rotating shaft constantly blows air towards the interior of the rolling drum, so that tea flies up, the efficiency that tea stalks are discharged out of the rolling drum is improved, and tea stalk separation is more thorough; a handful of tea mixed inthe tea stalks can be separated out by the separating cartridge, and the tea stalk separating efficiency is improved; and the tea stalk separating device is convenient to use, the tea and the tea stalks can be rapidly and efficiently separated, tea waste is avoided, and the tea quality is improved.