The air-suction bottom feeding system ensuring the automatic feeding of non-stop operation of the equipment with stable and reliable air separator; provided with the folder for the suction roller for the stable production in a high-speed state; rotary sizing unit ensuring the uniform glue spread and any forms of glue lines; automatic temperature control, stable and reliable, ensuring the drying effect and flatness of the paper. TECHNICAL PARAMTER: work speed: 5000-15000pcs/h specification of envelope :390?90mm-100?00mm gram weight of sqpaper:70-150g/m2 motor power:1.5kw dimensions of machine:4.5kw vacuum pump power:0.25kw weight of machine:1200kg machine dimensions:3200x870x1150m