The utility model relates to a bird composite set is prevented in looks direct screening in doing style of calligraphy strain insulator tower belongs to overhead transmission line and prevents bird pest technical field. Technical scheme is: contain a plurality of birds thorn no. 1, bird thorn no. 2 and bird thorn no. 3, bird thorn no. 1 sets up on the cross arm on the plane, and a plurality of birds thorn no. 1 is arranged and is hung near the point hangs with the overhead ground wire at well looks direct screening insulator chain, a plurality of birds thorn no. 2 arranges in cross arm is a little hung to the overhead ground wire that acupuncture is perpendicular to be set up downwards, a plurality of birds thorn no. 3 is arranged on the angle steel on inclined plane under the cross arm. The utility model discloses a positive effect: small, the quality is light, adopt nylon materials do not corrode, longe -lived, use the ferromagnetic material installation, dismantle the convenience, mounted position, installation orientation be unrestricted. The utility model discloses can effectually prevent that birds looks direct screening insulator top in doing style of calligraphy strain insulator tower from building the nest, perching and have wide market space.