The invention provides a clamper used for replacing a fuse, and is characterized in that the gripper includes a body, the upper end of the body is provided with a clamping mechanism, a drive mechanismis placed in the body and is fixedly connected, and a handle is placed on the bottom surface of the body and is fixedly connected. The method of application is as follows: first a right clamping plate is adjusted to maximum stroke, then a left clamping plate and a left guide rail are adjusted to appropriate positions, a fuse is placed between the left clamping plate and the right clamping plate,a left side end cover is located in a U-shaped groove of the left clamping plate, a motor reducer is started, the drive mechanism is driven to rotate, a lead screw is driven to rotate, a right clamping plate fixedly connected is driven to move towards the left side, the left clamping plate and the right clamping plate clamp the left side of the fuse and a right side end cover, the motor reducer stops movement, bolts on the end cover are manually dismounted, then the motor reducer is started to reversely rotate, so that the right clamping plate reversely moves, after a spring inside the fuse isloosened, the end cover is taken down, then the clamper is taken down, and the fuse can be replaced.