Special-purpose Small High-speed Carton Sealer for E-commerce, compatible with No.1-12 express cartons. Equipped with double-side belts and polygonal stable movement, it realizes automatic top and bottom sealing, effectively preventing carton warping and tape deviation for neat and smooth sealing. The carton width and height are manually adjustable for easy operation. Maintenance-free and ready-to-run upon power-on, it can work as a standalone unit or integrate with assembly lines, efficiently solving problems of slow packaging and order backlog during e-commerce peak seasons.