The invention relates to the field of paper hand bag processing and manufacturing, in particular to an air folding paper hand bag molding device and a hand bag molding method. The air-folding paper hand bag molding device comprises a transmission device, fixed plates, a transport trolley, an air folding device, limiting plates, a push plate and a mounting plate. The transmission device is arrangedon one side of the fixed plates. The transport trolley is used for carrying paper strips which are cut off and glued, the paper strips are placed horizontally in the transport trolley, and the transmission device transfers the transport trolley forwards. The air folding device is arranged below an upper convex region of the transmission device for bending the paper strips. The air-folding paper hand bag molding device can effectively complete hand bag production by using a simple mechanical structure and relatively simple operation steps.