The utility model discloses a circuit examines and repair instrument case, including the toolbox, its characterized in that toolbox is connected to the support frame through wire rope on, wire rope and support frame tie point are equipped with adjusting screw, and last gyro wheel and the bottom roller that is spherical shape is arranged to the length that can adjust wire rope about being equipped with on the support frame, and the support frame sets up the horizontal pole in last gyro wheel top, and the last middle pull ring that is equipped with of horizontal pole is equipped with the hasp on the support frame on one side of upward between gyro wheel and the bottom roller. The utility model discloses hang the toolbox on the electric wire to draw the pull ring to make the toolbox follow constructor to walk on the electric wire with the stay cord, avoiding the staff to hand -carry instrument and relevant gold utensil, reducing staff intensity of labour, and convenient to use.