The effects of high temperature steam curing and addition of metakaolin（MK） on the macro and micro properties of high ferrite cement（HFC） and its evolution mechanism were analyzed by various test methods. The results show that high temperature steam curing provides power for the hydration reaction of cementitious materials， increases the hydration rate， and promotes the formation of calcium silicate hydrate（C-S-H） gels and calcium aluminosilicate hydrate（C-A-S-H） gels. Metakaolin participates in hydration， consumes calcium hydroxide， reduces alkalinity of the system， introduces more Al， promotes formation of C-A-S-H gel， improves pore structure of HFC， and improves adsorption and solidification capacity of HFC for chloride. The coupling effect of high temperature steam curing and metakaolin increases the content of C-A-S-H gel in HFC， and improves the chloride corrosion resistance of high ferrite cementitous materials.