The Rayleigh wave technique is a new geophysical method for locating rock and soil. With its dispersion characteristics,speed of propagation and physical-mechanic properties, it can solve many engineering geological problems. This paper describes the utilization of this method in the quality inspection of the foundation treated by dynamic consolidation in No.1 construction site of Green-Cool (Nanchang) Science and Technology Yard. Some anomaly zones of low speed were found. It is pointed out that the foundation soil bearing capacity doesn't meet the designed requirements and hence some proper measures should be taken to strengthen the capacity. The effectiveness of the method has been proved by coring, light trigger exploration and civil engineering test.