To solve the problems in the certain type supersonic wind tunnel test about the runaway valve causing by the main pressure valve displacement sensor fault, the normal shock wave return to test-section and total-pressure excessive pressure protection insufficiency for different mach numbers. This paper presents the intelligence decision rule and treatment measure of the main pressure valve, researches the real-time monitoring system for normal shock wave position and improves the universe matching of total-pressure excessive pressure protection. The test results show that the above optimizing measures run stably and reliable, raise the intelligent and automatic level of control system, and play an important role for ensuring the wind tunnel test security.