Ratchet wrench used on antiskid chain

The utility model relates to the technical field of antiskid chains, in particular to a ratchet wrench used on an antiskid chain, which is characterized in that a ratchet mounting hole and a positioning head mounting hole which are communicated with each other are arranged on a wrench main body, a ratchet is arranged in the ratchet mounting hole, a positioning block is arranged in the ratchet, a positioning head is arranged in the positioning head mounting hole, and a spring is arranged at one end of the positioning head. The upper end of the positioning head is located in a tooth groove of the ratchet wheel, the wrench upper cover plate and the wrench lower cover plate are fixed to the two sides of a ratchet wheel installation hole, the positioning block on the ratchet wheel is clamped in a clamping groove in the ratchet wheel positioning piece, the wrench body is rotated in one direction, the positioning head is clamped in the tooth groove in the ratchet wheel, and at the moment, the ratchet wheel does not