The invention discloses a special operation wrench for a high-voltage power line patrol inspection robot. The special operation wrench comprises a wrench head, a wrench arm, a handle and a handle head, which are connected in sequence and integrally shaped like Z; two ratchet mechanisms rotating in opposite directions are respectively arranged on the two ends of the wrench head to form two unidirectional intermittent rotation actions in different directions for transferring unidirectional torque; the wrench head is matched with the cylindrical end of the wrench arm through a radial hole in the middle of the wrench head, and the wrench head is positioned through a spring and a convex point on the other side of the wrench head, so that the wrench head can rotate around the wrench arm to selectively use the ratchet mechanisms in different directions, and the reversing is very convenient; the wrench head can be replaced according to different sizes of bolts or nuts. The handle is connected with the tail end of the wrench arm through a bolt and a thrust bearing, so as to rotate around the axis of the handle; a handle sphere is mounted at the tail end of the handle through threaded connection and forms a movable connection similar to a spherical hinge with a clip of a robot end effector, so that the gesture requirements on the robot end effector is reduced, and the operation of the robot is facilitated.