The invention relates to the technical field of metal processing, in particular to a framework bending forming device. The framework bending and forming device comprises a fixing frame, and a first bending seat, a second bending seat, a third bending seat and a fourth bending seat are sequentially mounted on the fixing frame; the first bending seat comprises a rectangular base plate, the rectangular base plate is integrally connected with an I-shaped frame, a rectangular stand column is arranged at the rear end of the I-shaped frame, fixing-block connecting blocks are fixed to the tops the front side and the rear side of theI-shaped frame through nuts correspondingly, the fixing-block connecting blocks are rotatably connected with U-shaped fixing blocks, the right side of the rectangular base plate is further integrally connected with a hinging seat, the hinging seat is connected with a supporting air cylinder in a hinged mode, the supporting air cylinders penetrates through the I-shaped frame, a rectangular top block is fixed to the other side of theI-shaped frame through a nut, and the rectangular top block is rotatably connected with the I-shaped frame. The framework bending forming device can conduct simultaneous bending and is applied to processing of frame-shaped metal plates.