Leakage water is called the first stubborn disease of tunnel engineering by the construction industry. The saying of "ten tunnels and nine leaks" is widely spread among tunnel maintenance personnel. Leakage water can be called the "big moth" of tunnel engineering quality. It is worth noting that waterproof materials and waterproof construction technology are not independent of each other. Matching them is of great significance to prevent water leakage. This paper introduces the structural design of "sandwich" waterproof material

and successfully simplifies the two-step construction method of tunnel waterproof material into one-step construction method; At the same time

the R & D and production process of materials are discussed from the aspects of formulation design

preparation process and physical and mechanical properties test by using the concepts of "stripping zone theory "and "hot melt pressure sensitive" .