MCM-41 type spherical mesoporous silica material was synthesized, under basic conditions, in the presence of cationic surfactant as templating species. It has been studied the penetration phenomena of polyethylene oxide(PEO) into mesoporous silica. X-ray diffraction(XRD) experiments on polymer/spherical mesoporous silica samples has been showed that polymer chains were penetrated into pores of spherical mesoporous silica. It was known that more PEO chains were penetrated into mosoporous silica pores as increasing reaction time and thus the area of the endotherm corresponding to the crystalline PEO was reduced by the study of differential scanning calorimetry(DSC).