The porous ceramic separation membrane supports are prepared using alumina fine as main raw materials, and the TG/DSC curves of raw materials powder are analyzed. The effects of supports’ sintering temperature on the shrinkage are studied. The effects of different the sintering temperature, holding time and materials powder particle size on pore structure and size of supports are studied. The effect of the pore former dosage on porosity are studied. The results show that sintering temperature 1200℃, holding time 6h, porous agent more than 20%, prepared the uniform pore size distribution, porosity, accord with more than 50% of porous ceramics waterproof demand separation membrane supports.