In order to investigate the recoverability of compressive strength of concrete after high temperature exposure, the development law of compressive strength of the concrete after high temperature exposure repaired by inorganic coating repair agent with cooling method, curing time after high temperature exposure and repair agent use level was studied. Two cooling methods(natural cooling and water cooling), five kinds of curing time after high temperature(3,7,14,28,90d) and three repair agent use levels(03,06,09kg/m2) were considered. Following conclusions can be drawn: inorganic coating repair agent can effectively improve the deteriorated compressive strength of concrete after high temperature exposure. Repairing effect on concrete by natural cooling after high temperature exposure is better than that on concrete by water cooling. Curing time of concrete after high temperature exposure relies on the repairing effect of repair agent. The most reasonable use levels of repair agent is 03kg/m2.