The invention discloses an improved air purification and filtration device, which comprises a box body, and an air inlet and an air outlet formed in two sides of the box body, wherein a continuous S-shaped pipeline is arranged in the box body; a filtration box is arranged in each section of straight pipe of the pipeline; a first filtration part and a second filtration part are respectively arranged on two ends of the filtration box; the first filtration part comprises filter screens on two ends and a cotton layer arranged between the filter screens; the second filtration part comprises honeycomb screens on two ends and sulfur-borne activated carbon arranged between the honeycomb screens. According to the air purification and filtration device provided by the invention, the original simple box body structure is improved, the continuous S-shaped pipeline is arranged in the box body and is used for flowing and purifying air, one filtration box for air purification is arranged in each section of straight pipe of the pipeline, and the air can be fully purified through the continuous S-shaped pipeline after entering the pipeline, so that the air can be fully purified, and the space is saved due to the S-shaped pipeline arranged in the small box body.