The utility model discloses a prevent barb mechanism of transmission line reflective membrane, its characterized in that: it includes parallel groove clamp (1) to ditch fastener (1) includes the fastener of connecting through bolt (1 -2) (1 -1), and the both sides of fastener (1 -1) are equipped with barb connecting hole (1 -3), the connecting hole of acting as go -between (1 -4) respectively, and umbelliform barb (2) are connected in parallel groove clamp (1), and umbelliform barb (2) comprise portion of tying up (2 -1) and the steel strand wires silk (2 -2) that is umbelliform evenly distributed, the utility model discloses simple structure is practical, reduces the transmission line tripping operation, promotes the circuit safe operation, reduces the transmission line tripping operation, promotes the circuit safe operation.