Open ratchet wrench

Provided is an open ratchet wrench. Relates to a wrench. Comprising a wrench body, a movable wrench head and a fixed wrench head, the wrench is characterized in that a connecting cavity is formed in the side, facing the wrench body, of the fixed wrench head; the end part of the plate body extends into the connecting cavity and is hinged to the tail part of the fixed wrench head through a pin shaft I; a first torsion spring is arranged on the first pin shaft, one end of the first torsion spring is connected with the fixed wrench head, and the other end of the first torsion spring is connected with the wrench head. The movable wrench head is hinged to the connecting cavity, the top of the movable wrench head and the fixed wrench head form a clamping opening, and the tail of the movable wrench head is matched with the side of the wrench body. An elastic piece is arranged between the movable wrench head and the fixed wrench head and used for moving the top of the movable wrench head towards the fixed wrench head.