The utility model relates to a prevent bird isolated column in cat head sections tower mutually belongs to overhead transmission line and prevents bird pest technical field. Technical scheme is: the upper end that hangs board (4) is equipped with a plurality of and hangs hole (5), and fixing bolt (3) are passed and are hung the hanging of board (4) upper end hole (5), will hang board (4) and fix between parallel arrangement's two horizontal link plate (1), and the lower extreme that hangs the board passes through fixing bolt to be fixed between parallel arrangement's two fixed plate (6), it passes through the fixing bolt fastening between two fixed plate (6) to dangle the upper end of board (7), and the board that dangles (7) bottom is equipped with copper bell hanging hole (8), copper bell (10) through copper bell link (9) connection on the copper bell of the board that dangles hanging hole. The utility model discloses hanging in cat head sections tower in the middle of the looks cross arm, hanging a some superjacent air space with the insulator and separate, destroyed the strong condition that the nest was built to birds, the board that dangles produces under of the blowing of wind -force and rocks and drive copper bell and send the tinkle of bells, frightens, drives birds.