The utility model discloses a fixing frame of bridge detection equipment for sand construction. The device comprises a base, a support rod and an image acquisition device, the bottom end of the base is connected with a supporting rod through a hinge. the bottom end of the supporting rod is connected with a supporting plate through a hinge; a connecting hole is formed in the supporting plate; a fixed rod is vertically inserted into the connecting hole; a movable bearing is mounted in the top middle of the base; the inner ring of the movable bearing is fixed with the bearing rod; bearing rod arranged vertically, the top end of the bearing rod is fixed with the bottom end of the vertical hydraulic cylinder; the top end of the output end of the vertical hydraulic cylinder is fixed with the bottom end of the transverse hydraulic cylinder; according to the utility model, the supporting stability of the fixing frame is ensured, the falling of the fixing frame is avoided, the image acquisitiondevice is protected, the definition of an image acquired by the image acquisition device is ensured, and the detection precision is improved.