Although stone hanging is only a small part in the processing of stone curtain wall, it plays a quite important role, it can also be said that it is one of the most critical parts in the quality and safety problems of the stone material curtain wall accessories. But in the processing of wet strengthening method and dry installation method, the iron parts rust and spread to form rust yellow stone material surface. Factors causing rust is yellow, because stone material itself contains of ore minerals unstable or outside rust due to water infiltration to cause rust yellow stone material surface. Therefore, cutting the moisture content of stone can avoid the happening of yellow rust, there are four prevention measures as follows: