The invention discloses an anti-blocking powder discharging device and method for low-loose-density metal powder products. The device comprises a decomposer, a middle bin and a produced powder material bin, and the decomposer, the middle bin and the produced powder material bin are sequentially connected from top to bottom; the tops of the middle bin and the produced powder material bin are each provided with an exhausting port; the bottom of the middle bin is provided with a discharging valve; the device further comprises a decomposed gas dust remover, a disinfecting replacement gas dust remover and a dust collecting powder material bin; an inlet of the decomposed gas dust remover is connected with the exhausting port of the middle bin and the exhausting port of the produced powder material bin through pipelines; the top of the dust collecting powder material bin is provided with a dust collecting port and a disinfecting port; an inlet of the disinfecting replacement gas dust remover is connected with the exhausting port of the produced powder material bin and the disinfecting port through pipelines; and the dust collecting port is connected with an outlet of the decomposed gas dust remover and an outlet of the disinfecting replacement gas dust remover through pipelines. The device and method are good in powder discharging smoothness and high in powder product quality.