The utility model discloses an electric power construction rail bracing piece. This rail bracing piece includes a body of rod, the bottom of the body of rod set up four with the articulated supporting leg of being connected of the body of rod, when using, expand four supporting legs, can form the umbrella -type support, do benefit to the increase the utility model discloses a support stability, simultaneously, the adjusting bolt of terminal configuration and the rubber gasket of every supporting leg can adjust the height of four supporting legs through adjusting bolt, guarantee that the level of rail bracing piece is placed, can guarantee then through rubber gasket that the rail bracing piece is more firm with the contact on ground, when not using the rail bracing piece, can pack up four supporting legs, can not occupy great space, portable. Furthermore, the utility model discloses the personnel that have still set up are close to alarm device, and when the inoperative personnel were close to operation area, the proximity switch sensor was in time with passing to the controller in this information to control the audible alarm ware by the controller and send alarm signal, in time remind the staff to notice.