A high-voltage line strain clamp flow guiding plate bolt fastening machine arm comprises a ratchet wheel sleeve connected with a fixing wrench 1. The outer end of the fixing wrench is connected with afixing operation rod 2. The ratchet wheel sleeve is further connected with a swinging wrench 3, and the swinging wrench is connected with a swinging operation rod 4. A lengthened hexagonal inner sleeve 5 is arranged in the ratchet wheel sleeve. The fixing operation rod 2 and the swinging operation rod 4 are made of insulation materials. According to the high-voltage line strain clamp flow guidingplate bolt fastening machine arm, the operation can be finished through standing on a pole and tower cross arm or in an insulation bucket arm vehicle, entering of an electric field is not needed, thework risk is reduced, meanwhile, the work efficiency is improved, and safety of personnel and equipment during work is guaranteed.