The invention discloses a combined cable bridge flexible compensation device, which comprises a first panel and a compensation plate; one side of the first panel is provided with a second panel; an embedded mesh layer is respectively fixed inside the first panel and the second panel; the respective surface connection end of the first panel and the second panel is welded with a connection hinge; afastening bolt is arranged through the interior of the connection hinge; the left and right side walls of the first panel and the second panel are respectively welded with a side plate; the inner sideof the compensation plate is provided with a screw in a penetration manner; and the compensation plate is located below the second panel. In the combined cable bridge flexible compensation device, the bottom sealing plate itself has good compression and extension capability, carries out corresponding deformation matched with the telescopic expansion of the bridge body, and has the same function as the arc structure of the first panel and the second panel, both of which weaken the direct stretching action of the bridge body to the cable, and separate the cable from the bridge body so as to avoid excessive friction between the cable and the bridge body, resulting in cable damage.