Abstract: Based on the general corrosion data of the rebar steel in chloride ion environment, the general corrosion degree of the rebar steel was characterized. The distribution type of general corrosion depth of rebar steel was analyzed, and the reliability model of general corrosion of rebar steel was established. The example certification was analyzed and the development law of corrosion reliability of rebar steel in the given time was derived. The reliability calculation method of general corrosion of rebar steel was established.