The utility model discloses a transmission line high altitude cable wire formula hydraulic pressure tensioner bullwheel, including hydraulic power system and tight line remote -action system, tight line remote -action system includes hollow hydro -cylinder, hollow hydro -cylinder includes cylinder and piston, and the piston stretches out forward along the cylinder, and the front end of piston andthe rear end of cylinder all are connected with book sewing machine constructs, book sewing machine constructs and to include the back end plate, the jack catch mount pad that set gradually from the late arrival before, stir dish and spring plate that the center department of jack catch mount pad is equipped with three lamella jack catchs, stirs and is provided with compression spring between dishand the spring plate. The utility model discloses utilize hydraulic power system to promote the piston reciprocating motion of hollow hydro -cylinder, make to connect and construct and connect between rear end of the cylinder barrel's book sewing machine constructs through the cable wire conversion of loading in the book sewing machine of piston front end to realize the tensioning wire, the simple operation has reduced operator person's intensity of labour, has improved the fail safe nature of tight line operation, prevents to run the line occurence of failure.