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A novel micro-micro-mesoporous aluminosilicate LS-BFMZ(low-silica-BEA(beta)-faujasite(Y)-mesoporous)composite zeolite with the MCM-41 type structure was synthesized through a novel process involving the selfassembly of CTAB surfactant micellae with silica-alumina source originated from alkaline treatment of the beta zeolite.The physical properties of the LS-BFMZ composite zeolite were characterized using various techniques,including XRD,IR and SEM techniques.Meanwhile,a possible mechanism regarding the formation of the LS-BFMZ composite zeolite was proposed.