Abstract: To make full use of oil resources and obtain more light oil products, RIPP (Research Institute of Petroleum Processing) has developped RHT (Residue Hydrotreating Technology) and RICP (Residue hydrotreating Integrated with Catalytic cracking Process) key technology, an organic integration of RHT and RFCC, which can promote the heavy oil conversion and raise the light oil yield significantly. With regrad to RHT, on a basis of inheriting the advantages of RIPP's existing technologies, a new generation of RHT series catalysts and technology has been developped, featuring with hydroconversion of more large molecular species (such as asphaltene and gum) and hydrosaturation of more cracked polyaromatics molecules along with enhanced capability of removing metals (Ni and V) and hetero atoms (S and N). Results from commercial application show that achievements including high removal rate of impurities, prolonged operation cycle, a highly efficient utilization of both the catalysts and the reactor, as well as providing high quanlity feedstock for FCC process are realized successfully.