High-reliability sofa rapid folding device

The utility model discloses a high-reliability sofa quick folding device which comprises a supporting frame seat, connecting plates and a backrest frame, the two ends of the top end of the supporting frame seat are fixedly connected with the connecting plates, one side of one end of each connecting plate is rotationally connected with a hinge frame, the other side of one end of each connecting plate is rotationally connected with the backrest frame, and a supporting frame is arranged on the inner side of the backrest frame. A folding auxiliary structure is arranged at one end of the inner side of the backrest frame, a stabilizing structure is arranged in the supporting frame, and a backrest folding structure is arranged on one side of the two ends of the backrest frame. By arranging the backrest folding structure, when the backrest frame is folded to restore to the original shape, the gear rotates reversely, so that the arc-shaped clamping block rotates repeatedly along the teeth on the outer side of the gear