Abstract: High voltage breaking test is an important inspection method for the quality, operating characteristics, and operational reliability of high-voltage circuit breakers and other switchgear products.During the testing process, damage to the control relay may occur due to voltage spatial coupling or aging of the closing circuit breaker, leading to delays in the test and posing safety hazards.Through the realization process of the control function of high voltage breaking test being reviewed, it analyzes the reasons for the damage of the control circuit relay, provides protection and early warning measures, and ensures the safe and orderly conduct of high-voltage breaking test.It provides reference for the protection scheme of the control circuit of high voltage breaking test.