The machine is mainly used for pasting glue on the tongue of various envelope.It adopts 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 air-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;the automatic heating and drying unit can adjust the temperature freely,which is stable and reliable,ensuring the redrying effect and flatness of the paper.