Abstract: Fe, Mn substituted Lahexaaluminate were synthesized by reverse microemulsion in system of water / Triton X-100 /n-hexanol / cyclohexane. The effects of substituted elements on phase, specific surface area were investigated by means of XRD and BET. The results indicated that the synthesis method could make the hexaaluminate crystal form at lower temperature, 1100℃. Among 了LaMxAl12－xO19－α catalysts, the catalyst with 1 Mn iron (x=1) was the best. The introduction of Mn could improve the catalytic activity at low temperature and make methane lightoff temperature shift to lower value. Fe substituted Lahexaaluminate could make methane completely convert at lower temperature. Fe and Mn substituted LaMnFeAl10O19α had the highest activity at both low temperature and high temperature. Stability experiment was carried out for 100h, the conversion kept99.7％, and no deactivation was observed.