Bag taking device and method for garbage can

The invention discloses a bag taking device of a garbage can and a method thereof, and belongs to the field of household garbage cans. Comprising an outer shell, a garbage inner barrel is arranged in the outer shell, a bagging air suction hole is formed in the lower portion of the garbage inner barrel, a first upper cover is movably installed on the outer shell, a heat-sealing packaging ring is installed on the first upper cover, and a second upper cover is movably installed above the first upper cover. The garbage bag located at the circle center is jointly bound through the second heat sealing block and the first heat sealing blocks on the two sides of the second heat sealing block, the garbage bag is heated through the second heat sealing block, and sealing of the garbage bag is completed in cooperation with the first heat sealing blocks on the two sides; according to the design, compared with an existing automatic garbage can in the market, sliding blocks in two directions are adopted to extrude the garba