For cross-linking purpose，a new type aromatic dimethacrylate monDmer contain-ing sulfone group，bisphenol-S-bis (3-methaerylato-2-hydroxy propyl) ether (BisS-GMlA) has been synthesized from methyl methacrylate through three steps：i．e．via sa-ponification to glycidyl methacrylate and then reacted with bisphenol-S．This Bis-S type monomer BisS-GMA is more reactive toward cross-linking polymerizatiun than the corresponding Bis-GMA type monomer，bisphenol-A-bis-(3-methacrylato-2-hydroxy propyl) ether，and the Bis-S type polymer shows greater adhesive strength than that of Bis-GMA．The radical polymerizatiun is induced either by UV light or by peroxide-amine (BPO-DMT，BPO-DHET) redox system．Moreover，a typical composite resin comsisting of some quartz filler pretreated with a silane coupling agent and the men-tioned BisS-GMA binder，has been prepared with promising meehanieal properties such as rather high cvmpresion strength，high hardness，low abrasion and low expan-sion coefficient．