The utility model relates to a visitor vehicle license plate turning device. The license plate mounting panel pass through hinge assembly and connect on the bumper, hinge assembly on be equipped with return spring, the license plate mounting panel on be equipped with the locking rocking arm, the bumper on be equipped with spacing arch, when the locking rocking arm with spacing protruding when constituting the locking cooperation, the license plate mounting panel is in the closed condition, return spring was in the state that is twistd reverse this moment, when the locking cooperation was removed to locking rocking arm and spacing arch, the license plate mounting panel became to open the state from the open form of moving under the effect of return spring torsional force. According to the above technical scheme, the utility model discloses an install the license plate on rotatable license plate mounting panel, when the vehicle need use the unhook of bumper back, through opening the license plate mounting panel from the manual locking rocking arm that twists reverse in bumper bottom to realize exposing fast the mesh that the bumper breaks off relations at the back.