The utility model discloses a power construction operation warning board hook which is formed by a bottom plate, a hook plate and a connection shaft sleeve; the bottom plate and the hook plate are both rectangular, two corners of the same side are right angles, and two corners corresponding to the former two corners are arc angles; at least two fixing screw holes are uniformly distributed in the bottom plate; the connection shaft sleeve is arranged at the upper surface of the connection edge of the bottom plate; shaft holes are embedded in the connection shaft sleeve; the hook plate is further provided with a connection shaft and a U-shaped hanging ring; the inner wall and top of the hanging ring respectively correspond to arc bulges; the distance between the arc bulges is 1/6-1/3 of the maximal interval of the hanging ring. The power construction operation warning board hook has the characteristics of simple structure, convenience in mounting, reasonable and standard use, and high reliability and stability, on one hand, the time for mounting the traditional operation warning board is greatly shortened, and the work efficiency of various power operations is improved; on the other hand, an operator is helped to be fast familiar to, master and standardize various power operation processes, and the management quality of power work and the self-quality of workers are greatly improved.