The invention discloses composite ultra-strong corrosion preventing and seepage stopping wall materials and an application method thereof. PVC serves as the main material of the wall materials, several additives are added and are extruded and formed through a die after being stirred and subjected to the high temperature, connecting devices are reserved on the two sides of the wall materials, a concave groove is formed in one side, and a convex groove is formed in the other side. During using, the convex groove of the rear wall material is arranged in the concave groove of the constructed front wall material through a special device in a sleeved manner, and the front wall material and the rear wall material are connected with each other in a hooked manner, and a corrosion preventing and water stopping curtain system is formed. According to the needs, the wall materials can be machined to be in the shapes such as a flat plate, a double curvature arch and a multi-curvature arch, wherein the flat-plate-shaped wall material has the functions of corrosion preventing and seepage stopping, and the wall materials of the double curvature arch type and the multi-curvature arch type have the functions of corrosion preventing and seepage stopping and also have the function of supporting. Due to the fact that extruding devices are different in power, the width of the machined wall materials can range from 500 mm to 1,200 mm, and the thickness of the machined wall materials can range from 5 mm to 12 mm. The length of the wall materials can be flexibly determined according to the using requirements and the transporting conditions. The wall materials overcome the defects in the prior art, and the purposes of corrosion preventing, seepage stopping and supporting are achieved.