The invention discloses a vernier caliper used for measuring hole center distance, and the vernier caliper comprises a main body (1), a first fixing claw (2), a second fixing claw (3), a first vernier(4) and a second vernier (5), the first fixing claw is arranged on the upper surface of the main body, and the second fixing claw is arranged on the lower surface of the main body. Moreover, the first vernier can be arranged on the upper surface of the main body in a sliding manner along the extension direction of the main body, and the first vernier at least comprises a first moving claw (6) matched with the first fixed claw. The second vernier can be arranged on the lower surface of the main body in a sliding mode in the extending direction of the main body, the second vernier at least comprises a second moving claw (7) matched with the second fixed claw, and the longitudinal section of the end, away from the main body, of the second fixed claw and the longitudinal section of the end, away from the main body, of the second moving claw form an isosceles triangle structure. The effects that the hole center distance can be measured at a time, errors are reduced, meanwhile, the production efficiency is improved, and the labor cost is saved are achieved.