Abstract: The structured beam structure of overhead transmission line pole and tower truss, Providing a habitat for the birds, Bird damage faults has been changing in recent years 1, The original bird-proof, bird-proof box, electronic bird drive device often appear hidden danger 2, Device hidden dangers cannot meet the new bird damage prevention requirements, 3, Birds continue to reside and nest on pole-tower trusses, The new bird's nest is constantly appearing on the "five top", namely: above the insulator, above the bow line, above the bird-proof spur, above the V-shaped string, and above the overhead ground wire bracket; According to the of 18 Major Power Grid Anti-Accident Measures (2020 Revision) 4, Technical Guidelines for Bird Failure of Overhead Transmission Lines, 5, Against the new "five top" bird damage prevention, Combined with 6 of Technical Specification for Bird Guard of Overhead Transmission Line, Establishing the FNDB material selection algorithm model, Tiered wading bird risk control, PC Terminal System Application, Effectively prevent the occurrence of bird damage accidents.