The utility model provides an electric power steel tube iron tower signboard fixing device. The electric power steel tube iron tower signboard fixing device comprises a bearing frame (1), a U-shaped connecting bolt (2) and a tongue plate (3) with the L-shaped longitudinal section. The bearing frame (1) comprises a top plate and a side plate perpendicular to the top plate. The middle of the top plate is provided with two screw holes through which the opening ends of the connecting bolt are allowed to penetrate. The side plate is provided with at least two signboard holes (4) through which a signboard is fixed. The connecting bolt (2) is fixedly connected with the bearing frame (1) through nuts. A screw hole is formed in the tongue plate (3). The upper portion of one connecting arm of the connecting bolt (2) is sleeved with the tongue plate which is fixedly connected with the connecting bolt through a nut. According to the electric power steel tube iron tower signboard fixing device, the signboard and a steel tube iron tower can be firmly connected, the signboard installation process is safer, and the installation efficiency can be effectively improved.