Monkey wrench

The utility model relates to the technical field of wrench tools, and discloses a movable wrench which comprises a main body, a fixed arm, a movable arm and a locking mechanism, a tooth path is arranged on the body in the length direction of the body, the fixed arm is fixedly connected to the first end of the body, and the movable arm is arranged on the body in a sleeving mode and can move in the length direction of the body. The locking mechanism is arranged on the movable arm, the locking mechanism enables the movable arm to have an adjustable state and a locking state, in the adjustable state, the locking mechanism is separated from the tooth path, and the movable arm can move in the length direction of the main body so as to adjust the clamping distance L between the fixed arm and the movable arm; in a locking state, the locking mechanism is clamped with the tooth path, and the movable arm is fixed at a preset position of the main body, so that the clamping distance L of the wrench is fixed; the monkey wr