The utility model relates to an electric power system drives bird technical field, specific cross arm drives bird ware that says so, its characterized in that drives the bird ware and is equipped with arc -shaped baffle and fixed mounting board, and the baffle lower extreme is preceding, the back both sides are connected with the fixed mounting board respectively, is equipped with the locating hole on the fixed mounting board, is equipped with the reflector layer on the baffle lateral wall and along radially being equipped with round arc positioning groove, is equipped with preceding bandage and back bandage in the positioning groove, and the casing left end is equipped with the convex mounting groove with wire pole matched with. The utility model has the advantages of simple installation, long service life.