Abstract: Reforming support，spherical γ-alumina granules with high purity and suitable pore structure were prepared by water column forming method using pseudoboehmite（PB） and sodium alginate（ALG） as raw materials.PB was selected，and influence of forming time on the deprivation of sodium ion was investigated.The influences of the mix ratio of two different PB on the properties of spherical γ-alumina were studied.The catalyst of carrier was also evaluated.Results indicated that the sodium ion mass fraction of γ-alumina granules can be reduced to 1.9×10-5 when the forming time was 30 min and sodium al- ginate did not introduce sodium either；γ-Al2O3 with pore volume of 0.568 cm3/g，specific surface of 217 m2/g，strength of 47 N per 1 particle，and bulk density of 0.564 g/mL could be prepared by choosing appropriate ratio of PB.Reforming catalyst prepared by the carrier using for evaluating，the liquid yield，aromatic yield，and octane number were all superior to the same products in abroad，and the application prospect was good.

Key words: catalytic reforming, spherical alumina, water column forming