Abstarct: In this research, for the first time, xonotlite (Ca6Si6O17(OH)2) has been used as a support due to the cheapness of raw materials, abundance, porous structure, high surface area and low density. The reaction of sodium silicate and calcium chloride formed a combination of xonotlite. The xonotlite was functionalized with 3-(tri-methoxysilyl)propylamine (MSPA). In the next step, the prepared manganese Schiff baxse complex was grafted on this organo-functionalized xonotlite. The prepared compounds were characterized by X-ray diffraction (XRD) analysis, Fourier-transform infrared spectroscopy (FT-IR), X-ray energy dispersive spectroscopy (EDX), scanning electron microscopy (FE-SEM), surface area (BET) techniques, inductively coupled plasma atomic emission spectroscopy (ICP-AES). Also, The prepared catalyst was applied for the catalytic epoxidation of cis-cyclooctene and the effect of several parameters such as the solvent, catalyst and oxidant contents and time on this reaction were studied. Then it was used for the epoxidation of some other alkenes. Under optimal conditions, it was observed that the heterogeneous catalyst showed excellent performance and efficiency in the epoxidation process.