Exemplified by the densification flexible compound foundation, this paper deals with the feasibility of the application of multi-channel transient Rayleigh wave and ground-probing radar technique assisted by a few loading tests to the integrated appraisal of the effect and uniformity of flexible compound foundation reinforcement, with a comparison with the traditional test methods such as loading test. The results show that this method can rapidly and effectively make semi-quantitative and quantitative appraisal of the effect and uniformity of flexible compound foundation reinforcement and reflect the continuation and range of the variation of foundation reinforcement effect, thus more rapid, effective, economical and objective than the traditional test methods in many aspects.