Abstract: Respectively in the systems of pyrrodine and 1-Butylamine as templates, ZSM-35 type zeolite membranes were hydrothermally synthesized originally in situ on the outer surface of porous α-Al₂O₃ tubes with pore size of 3—5μm.Characterization of the as-prepared membranes with XRD and SEM showed that the prepared membranes were typical zeolite ZSM-35 membranes, on which the zeolite crystals grew interlockedly and compactly and covered completely the outer surface of the ceramic tubes with thickness of about 12—18 μm, and that templates with different structures influenced apparently the morphology of the as-prepared membranes; calcinations of as-synthesized membranes at different temperatures indicated the orientation of crystals on the as-prepared membranes tended to be along (h 0 0) direction with increasing calcination temperatures; and at ambient temperature，H₂, N₂ and C₃H₈ single component permeance tests of the membranes reached the order of magitude 10^-6 with H₂/N₂ and H₂/C₃H₈ selectivity factors respectively above their corresponding ideal Knudsen diffusion factors.