The depth of burial of the basement of Dalian International Ocean Building is 22 75m and the total waterproofing area of it is 18200m 2. The waterproofing concrete, APP modified asphalt waterproofing coiled material and SBS modified asphalt waterproofing coiled material are used in the waterproofing Project construction. The waterproofing quality is very good because of the strict construction quality control of concrete and coiled materials.