Adsorption pressure relief jig for vehicle sign

The adsorption and pressure relief jig comprises a workbench, an adsorption disc is fixedly installed at the top of the workbench, a pressure relief valve is installed on the outer side wall of the workbench, a positioning structure is arranged at the top of the workbench, and the positioning structure comprises a positioning rod and a thrust arm; the positioning rod is fixedly installed on the top of the workbench, and a positioning disc is installed on the thrust arm. According to the adsorption pressure relief jig for the vehicle sign, the circular positioning disc is guided by arranging the positioning rod and the guide rod, so that the positioning disc can be guided when being pressed downwards to make contact with the guide rod and can be gathered to the middle of the positioning rod all the time to correspond to the adsorption disc, and due to the fact that the positioning disc carries a sticky plate at the moment, accurate correspondence does not need to be conducted; and the first sliding rail and th