Discloses are a secondary bagging method and a device. The secondary bagging method includes steps: (1) taking an empty bag; (2) sleeving the empty bag; (3) clamping the empty bag; (4) opening a bag opening; (5) filling the bag; (6) dropping the bag; (7) shaping the bag opening; (8) grabbing the filled bag; (9) conveying the filled bag; (10) clamping the filled bag; and (11) outputting the filledbag. The device comprises a bag sleeving mechanism (1), a bag clamping mechanism (2), a buffering mechanism (3), an oblique chute (4), a bag shifting mechanism (5), an opening clamping mechanism (6),a belt conveyor (7) and a lifting conveyor (8). By the aid of the bagging method, bags of articles or rectangular blocky articles can be automatically filled in outer-layered packaging bags, and impact generated during bagging is reduced.