Fixing device for trailer

The invention discloses a fixing device for a trailer, and aims to provide a fixing device for a trailer, which is provided with a length-adjustable towing rope to reduce the impact force of collisionbetween two vehicles. The fixing device comprises a storage box, a towing rope, buffer modules, fixing modules and a contraction module; the buffer modules are connected with the side surface of thestorage box; the fixing modules are arranged at the upper end of the storage box; connection modules are arranged on the two sides of the storage box; the connection module on one side is connected with the storage box; the connection module on the other side is connected with one end of the towing rope; and the other end of the towing rope passes through the storage box and is connected with thecontraction module. The fixing device has the beneficial effects that the towing rope can extend and contract to change the length; the impact force generated by the collision of the two vehicles canbe reduced through buffer bl