Abstract: Three kinds of calcium alginate beads were prepared from three sodium alginates with different viscosities by emulsification-internal gelation.Their shapes were analyzed with a micro-analyzer and some properties of the sodium alginates were surveyed.The results showed that sodium alginate with low viscosity could be better carrier for liposoluble substances.The average diameters of the alginate beads formed from sodium alginates with differing viscosities were different.The larger the viscosity was,the larger the average diameter of the alginate beads was.