Low-energy-consumption carbon dioxide trapping device

The invention discloses a low-energy-consumption carbon dioxide trapping device which comprises a treatment box, supporting legs are installed at the bottom end of the treatment box at equal angles, a liquid discharge pipe is installed at the bottom end of the treatment box, a liquid inlet pipe is installed on one side of the treatment box, valves are installed on the liquid discharge pipe and the liquid inlet pipe, and an exhaust pipe is installed at the top end of the treatment box. A capturing treatment assembly is installed in the treatment box, the outer side of the treatment box is sleeved with an annular box, air inlet branch pipes are installed on the side, close to the treatment box, of the annular box at equal angles, the air inlet branch pipes communicate with an inner cavity of the treatment box, and an air inlet pipe is installed on the outer side of the annular box; according to the device, in the working process, the piston longitudinally reciprocates, ammonia water is continuously lifted into