The invention discloses a multi-purpose high-voltage insulation testing plier, which comprises a plier body, a transmission device, and an insulation rod. The plier body is provided at one end of theinsulation rod. One end of the transmission device is connected to the handle of the plier body, and the other end is fixed on the insulation rod. The transmission device comprises a transmission line, a fixed pulley, a transmission line sheath, and a torque tensioner. One end of the transmission line is fixed on the movable handle, and the other end is fixed on the torque tensioner through the fixed pulley and the transmission line sheath. One end of the transmission line sheath is fixed by a first sheath fixing clamp provided on the insulation rod, and the other end is fixed by a second sheath fixing clamp provided on the fixed handle. The transmission lines between the transmission sheath and the torque tensioner are connected by a insulation isolating connecting plate. Compared with the prior art, the multi-purpose high-voltage insulation testing plier can prevent a testing operator from carrying out a climbing operation, thereby avoiding risks of high drop and induced electric shock, and ensuring a safe and reliable testing process.