The invention discloses a device for a traffic indication board. The device comprises a card containing base cooperatively connected with the indication board, a supporting column is fixedly arrangedin the center of the lower end face of the card containing base, and a loading plate is fixedly arranged on the bottom end face of the supporting column; multiple mounting holes which run through theupper and lower portions of the loading plate and are used for screws to penetrate through are formed in the loading plate, a first sliding cavity and a conveying cavity are formed in the card containing base, and a second sliding cavity which extends leftward and rightward is formed in the inner wall of the card containing base at the front side of the conveying cavity; conversion components aresymmetrically arranged on the portions, in the inner wall of the card containing base, at the left and right sides of the first sliding cavity, the conversion components at the left and right sides are located on the upper portions of the extension segments at the left and right sides of the second sliding cavity respectively, a first sliding block is slidingly and cooperatively connected to the interior of the first sliding cavity, and a push press rod which extends to the rear side is fixedly arranged on the rear end face of the first sliding block. The device for the traffic indication board is simple in structure and convenient to operate, and the mounting stability of the indication board is improved.