The invention relates to a high-altitude operation safety protection belt for power maintenance, and belongs to the technical field of high-altitude protection. The high-altitude operation safety protection belt for power maintenance, provided by the invention, has the advantage of convenient adjustment, and the problem of adjustment inconvenience is solved. The high-altitude operation safety protection belt for power maintenance comprises a storage box, wherein a connection belt is fixedly connected with a left-side surface of the storage box, a connection block is fixedly connected with a bottom end, far away from the storage box, of the connection belt, and a storage belt is fixedly connected with one side, far away from the connection belt, of the connection block. In the high-altitudeoperation safety protection belt for power maintenance, a movable plate and a clamping rod are arranged, the movable plate is driven to rotate by a movable rod, so that the storage belt can freely move in the storage box, the movable plate is automatically restored to an initial position by matching a reset device after the movable rod is loosen, the storage belt is fixed by the clamping rod, thediameter of a round ring formed from the connection belt and the storage belt is adjusted, and the specification of the round ring is freely adjusted according to the body of a worker; and the high-altitude operation safety protection belt for power maintenance is applicable to the technical field of high-altitude protection.