Abstract: Tahe naphthenicbase atmospheric residue was catalyticallyhydrocracked in a magneticstirred autoclave with oilsoluble MoDTC. The two solid acids (USY and HY), two solid bases (CaO and MgO) and two radical initiators (2, 2′Azobisisobutylonitrile and bitertbutyl peroxide) have been introduced into the system to improve the hydrocracking of residue. It is found that the solid additives including the acids and bases could considerably increase the cracking conversion and coke formation, especially the later. The initiators AIBN and BBPO could greatly improve the hydrocracking conversion of the residue so that the yields of cracking products increase and the coke yields hardly increase. The effects of the radical initiators at lower reaction temperature are better than that at higher temperature. The improvement with BBPO is more remarkable than that with AIBN.