The invention belongs to a power transmission and transformation construction tool, and particularly relates to an insulator salt density value test string hanging clamp comprising a clamp body (4), fastening bolts (2), fastening nuts (3) and a reinforced rib (5). The upper part of the clamp body (4) is connected with a pressing plate (1) by the fastening bolts (2) and the fastening nuts (3). The lower end of the clamp body (4) is flexibly connected with a right-angle hanging plate (6) by the fastening bolts (2) and the fastening nuts (3). The lower end of the right-angle hanging plate (6) is flexibly connected with a ball head ring (7) by the fastening bolts (2) and the fastening nuts (3). According to the insulator salt density value test string hanging clamp, labor intensity and number of installation staff of insulator salt density value test strings can be reduced, safety of the insulator strings which are needed to be hung for a longer period time of two to three years is ensured, potential hazards of electric shock accidents of the installation staff are eliminated, and safe operation of equipment and personal safety of the staff are ensured.