The invention discloses a splitpin installer capable of electrification installation of an insulator M pin. The splitpin installer comprises a clamping plate, a push rod, a guide cylinder, a starting block, a spring, a blocking head, an extension rod and an insulating rod, wherein the clamping plate is U-shaped, and the M pin is installed at an U-shaped opening of the clamping plate; the guide cylinder is arranged at the rear end of the clamping plate, a sliding chute is formed in the guide cylinder along the radial direction, and an installing hole corresponding to the push rod is formed in the rear end face of the clamping plate; the push rod is arranged in the guide cylinder, a collision block is arranged at the front end of the push rod, and the collision block is positioned in the U-shaped outline of the clamping plate; the starting block is arranged at the rear end of the guide cylinder through a rotating shaft, the push rod is provided with a clamping rod, and the clamping rod is positioned in the sliding chute; the spring is arranged on the push rod, a guide hole corresponding to the push rod is formed in the rear end face of the guide cylinder, and the spring is positioned between the clamping rod and the guide hole. The splitpin installer is simple and durable in structure, convenient to maintain, simple in operation and high in efficiency, and the splitpin installer is capable of electrification installation of the insulator M pin, so that the maintenance work efficiency is effectively improved, and the personal safety of workers is guaranteed.