Abstract: This paper studied the means of diphase emulsion to make bovine albumin microcapsuals with hydroxy proprl methyl celluloxe phthalate, effection of the wrap material, reagent of emulsification, hydrophilic colloid of protection and pH of testing protein on the bradford protein assay, the folin-phenol assay and UV-absorbing methods for testing the envelopment protein capacity of microcapsules. The end that shape of microcapsules was orbicular or elliptic and no conglutination, the best means for testing envelopment protein capacity of microcapsules is the Folin-pHenol assay because it has the least effection.