The invention discloses an H-shaped steel cable erecting tool and an application method thereof. The H-shaped steel cable erecting tool comprises a [-shaped plate, a fixing bolt, a fixing base plate, a cable roller, a fastening buckle plate and a fastening buckle plate clamping piece. The [-shaped plate comprises two flat plates which are parallel to each other and arranged at an interval and a connecting plate used for connecting the two flat plates, screw holes are formed in the flat plates, fixing bolts are fixed to the screw holes, the H-shaped steel cable erecting tool can be fixed to H-shaped steel through the [-shaped plate and the fixing bolts, and the fixing base plate makes contact with the side, away from the flat plates, of the connecting plate and is fixedly connected with the side, away from the flat plates, of the connecting plate; a cable roller is fixed on the fixed substrate, a cable is arranged on the cable roller, a fastening buckle plate clamping piece is fixed on the cable roller, the fixed substrate is connected with the fastening buckle plate through a connecting rod, and the connecting rod and the cable roller are located on the two sides of the cable respectively. The fastening buckle plate can rotate around the connecting rod, and a clamping groove structure matched with the fastening buckle plate clamping piece is arranged on the fastening buckle plate. The erecting tool is easy to manufacture, safe, reliable and high in refitting performance.