The invention discloses a powder subpackaging device comprising a discharging nozzle and a raise powder collector which is arranged below the discharging nozzle and comprises a discharging cup and a raise powder collecting cup. The discharging nozzle is formed in an upper end opening of the discharging cup, the lower portion of the discharging cup is installed in the raise powder collecting cup in a sleeved mode, and a raise powder collecting opening is formed in the position, corresponding to the upper portion of an outlet of the discharging cup, of the side wall of the raise powder collecting cup. A sandwich layer channel is formed between the outer wall of the lower portion of the discharging cup and the inner wall of the raise powder collecting cup and used for collecting raise powder. The sandwich layer gap is communicated with a collecting and filtering device arranged externally. The raise powder collector is arranged on the lower portion of the power subpackaging device, so that the structure is simple and reasonable, the powder is effectively prevented from flying apart, and product quality is guaranteed.