The ZF-390C fully automatic envelope gluing machine is versatile in both Chinese and Western styles. It can process Chinese envelopes from size 1-10 and Western envelopes from size 2-9, as well as various non-standard and standard large paper bags, such as Kodak bags. It can automatically press the four sides, stop multiple paper jams, and use air suction bottom suction for paper feeding. The horizontal folding part uses air suction roller fence folding, which is comparable in speed and accuracy to similar equipment at home and abroad. At the same time, it overcomes the disadvantage of single processing specifications of other similar equipment at home and abroad.