Comparing with rebound method, the ultrasonic rebound synthetic method was more close to the strength test results of core sampling method through theoretical analysis and field test data, which embodied the superiority of ultrasonic rebound method for nondestructive test and illustrated that nondestructive test is gradually replacing the destructive test, meanwhile, we explored the fitting function by the mathematical statistic method. The superiority analysis of ultrasonic-rebound combined method could have a deeper understanding of the interior of the pavement strength and provide certain help with exploring the road damage mechanism, which will provide support for premature failure of prevention and control work on the existing cement concrete pavement in HuangShi area.