The invention discloses a low energy-consumption sorghum stalk juicing device. The low energy-consumption sorghum stalk juicing device comprises a box body, wherein a feed inlet is formed in the upperend face of the box body, and a blanking channel is arranged on the lower end face of the feed inlet in a communicating mode; first transmission cavities with openings toward the blanking channel areformed in the blanking channel in a left-right symmetrical mode, and sector-shaped rotating cutters are arranged in the first transmission cavities; fixed shafts are fixedly arranged on the upper endfaces of the rotating cutters, and second transmission cavities are formed in the upper sides of the first transmission cavities in a communicating mode; and the second transmission cavities communicate with each other in a left and right mode. During working of the low energy-consumption sorghum stalk juicing device, only one motor is used, the operation of the whole device is driven by the transmission relationship of a belt and gears, the power consumption is reduced, a detachable elastic residue filtering bag directly collects sorghum stalk residues after the juicing, the sorghum stalk residues do not need to be manually collected again, the residue collection work can be completed by replacing the elastic residue filtering bag, labor cost is saved, the blockage of the device does notoccur, and the service life of the device is prolonged.