The invention discloses a power transmission line carbon fiber clamp which is made of a carbon fiber reinforced resin-based composite material. The power transmission line carbon fiber clamp has the advantages that the clamp is light in weight, low in manufacturing and material cost, high in resistance to high temperature, low temperature and corrosion and good in processing performance, operating process is effectively simplified, labor intensity of operating personnel is reduced, dangerousness of live operation is lowered, working efficiency is improved, number of power failures is reduced effectively, power supply reliability of a power grid is improved, reliable power supply of whole society is guaranteed, and the clamp has remarkable social benefit.