Through laboratory test and practical engineering application,the technique of testing and evaluating the reinforcement corrosion in concrete structure was studied based on the electrochemical synthesis method.The paper studied the rule of the impact on three electrochemical detection results of concrete resistivity,half-cell potential and corrosion current density by different corrosion conditions and test conditions through three groups of specimen tests and obtained a progressive assessment criteria to detect the state of reinforcement corrosion in concrete with the electrochemical synthesis method.It regarded the test item of a high-pile wharf as the research object,and detected the state of reinforcement corrosion in concrete with electrochemical synthesis method and comprehensively evaluated the situation of reinforcement corrosion according to progressive assessment criteria.The results show that the technique of testing and evaluating the reinforcement corrosion in concrete with the electrochemical synthesis method can effectively improve the accuracy and reliability in detecting the situation of reinforcement corrosion.