The utility model relates to a sand-blocking and sand-fixing plate with a gradually-changed aperture ratio and a sand-blocking and sand-fixing combined plate. According to the direction from top to bottom, the air guide holes in the sand blocking and fixing plate are distributed in the trend that the hole area is decreased gradually, and therefore the hole opening rate of the sand blocking and fixing plate is decreased gradually, and the ventilation resistance of the sand blocking and fixing plate is increased gradually. The sand blocking and fixing combined plate is composed of two or more sand blocking and fixing plates with different aperture ratios, and the aperture ratios of the sand blocking and fixing plates are decreased in the direction from top to bottom. Due to the fact that thestructural design that the upper portion is sparse and the lower portion is dense is adopted, wind with different heights and different strengths can be effectively guided to pass through the air guide holes, wind erosion is reduced, and the defects of a single-structure sand blocking and stabilizing plate with the invariable aperture ratio are overcome. Sand sedimentation is promoted, and the sand stabilization effect is good.