The invention relates to a vacuum sucking disc capable of being adsorbed to the coarse surface of an object. The vacuum sucking disc is mainly composed of a sucking disc, a pressure plate and an adjusting bolt. Before use, the sucking disc is firstly pre-adhered to the surface of the object by using a paster outside release paper; then the adjusting bolt is rotated to pull the center of the sucking disc away from the surface of the object so as to form a vacuum space or a negative space between the sucking disc and the object; when the vacuum space or the negative space becomes larger and larger, an inward pulling force is generated to the inner wall of the sucking disc, and the pulling force is transferred to the adjusting bolt through a connecting column and then is transferred to the pressure plate through the adjusting bolt, so that the pressure plate enables the peripheral edge of the sucking disc and the periphery of the paster to be more tightly pressed to the surface of the object. As a double faced adhesive tape for manufacturing the paster has a certain thickness, the double faced adhesive tape subjected to great pressure from the pressure plate deforms to fill the gap between the peripheral edge of the sucking disc and the surface of the object if the surface of the object is coarse and is not smooth, so that the vacuum sucking disc can be suitable for the coarse surface of the object.