Ni-base alloy(GH30) rigid sintering meshes is an impotant porus functional and structural material used for transpiration cooling. In this report, diffusionsintering characteristics of the meshes material have been studied by the different surface modification methods, such as electroless plating, ion sputtering, metal ion direct implantation and ion beam assisted deposition. The main resutls indicate that transitive liquid phase sintering induced by surface alloy depositions and surface activation produced by implantation of active ion B and Nb can effectively improve the sintering properties and the micro structure of the material. For surface modification treatment, cleaning by ion-beam sputtering in high vacuum befroe deposition or implantation plays an important rloe in impriving the interface micro structure. AES, XPS and SEA have been used investigate the distribution and the behavior of the active ion B and Nb. Changes of electron emission feature of surface atoms during heating appear to be mahor factor on the effect of surface modification. From these test evidences, the surface modification and activation mechanisms of diffusion sintering for Ni-base alloy rigid meshes material have been discussed.