The invention discloses a compound stabilizing method for silty soil in Yellow River flooded areas and belongs to the technical field of road construction materials and road building. The method can be realized through reasonable mix proportion of a sodium methyl silicate aqueous solution, polyacrylamide, pulverized coal, lime and silty soil. According to the method, not only can the cost be lowered, but also the non-laterally confined compressive strength and anti-penetrability performance of the silty soil can be improved. In addition, the method also has the advantages that the functions of resisting capillary water and preventing rise of the capillary water can be achieved, and the stability property of the water can be enhanced so as to prevent the damage of roadbed and road surfaces; and the maintenance cost can be lowered, the road service life can be prolonged, and the like.