The utility model provides a flag is enclosed to modified electric power safety, includes lifting rope (7), pennon (1), the lifting rope level is placed, and lifting rope horizontal position's lower extreme seam has one block cloth (8), evenly inlays above the cloth three female snap button (4), the lantern ring (6) have been stitched respectively at both ends about the lifting rope, and two -waycouple (5) is connected to the lantern ring, three public snap -fastener (3) are evenly inlayed on shown pennon upper portion, female snap button lock on public snap -fastener on the shown pennon andthe lifting rope cloth. Warning marker (2) are printed on on the pennon. The utility model discloses a two -way couple carries out simple combination with the lifting rope both ends lantern ring, andthe flag is enclosed to the electric power safety of alright the different length of acquisition, the utility model discloses a pennon can be changed very conveniently to snap connection mode betweenpennon and the lifting rope cloth. The utility model provides a warning marker adopts the print through technique, the user enclose by electric power safety that the flag keeps apart regional inside and outside can all be clear see the warning content on the pennon, convenient to use.