The invention provides an anodically coated steel strand corrosion state characterizing method. The method comprises the following steps that: a) electrochemical parameter testing is performed on anodically coated steel strands in different corrosion states separately, and the self-corrosion current densities of the anodically coated steel strands in the different corrosion states are calculated according to test results, and are adopted as electrochemical values for judging the corrosion states of the anodically coated steel strands; b) electrochemical parameter testing in the step a) is performed on a corrosion state-unknown anodically coated steel strand, the self-corrosion current density of the anodically coated steel strand is calculated, and is compared with the electrochemical values in the step a), so that the corrosion state of the anodically coated steel strand is characterized. According to the characterizing method, the corrosion state of the anodically coated steel strandcan be scientifically and quantitatively evaluated, and the estimation of the remaining service life of an in-service overhead ground wire is effectively prolonged. The method has the advantages of high accuracy, high reliability, high efficiency, high economical efficiency, environmental friendliness and the like, and provides a scientific basis for the maintenance and replacement of in-servicesteel strands.