Abstract: The bromobutyl rubber/phenolic sulfuration resin composite latex with 9.3% solid content was prepared by the method of dissolution and emulsification,and the composite latex was concentrated by the creaming method, with sodium alginate as creaming reagent. The effect of dosage of creaming reagent on creaming time, latex solid content and average particle size was studied, and it was found that the composite latex particle size was too large, and the concentration period was too long, about 15 days. The dry rubber transect made from composite latex was observed with SEM. It was discovered that large particles of the creaming composite latex syncretized very well, and formed dry rubber membrane. The 0.6mm rubber membrane was made by coating, drying and vulcanizing, and the mechanical properties and the permeation rate for H2 were determined. The results indicated that the vulcanized membrane was good in mechanical properties and the permeation rate for H2 was lower than NR and CR, with relative permeability 9.64% of NR, and 71.3% of CR.