Abstract: This paper studies the multi-reinforcement composite foundation improved by prefabricated vertical drains (PVDs) with cement mixing piles, and the influence of clogging effect of PVDs is considered by assuming the permeability coefficient of PVDs decays exponentially with time. In addition, the smear effect of PVDs, the disturbance effect of the cement mixing pile, and the coupled radial-vertical flow within the soil are considered. The governing equations of consolidation of the multi-reinforcement composite foundation and the corresponding solutions are derived. The solutions is verified by comparison with several existing solutions and three field tests. Finally, the consolidation behavior of the multi-reinforcement composite ground is analyzed by a series of parametrical analysis. The results show the well resistance factor \theta has a great influence on the later stage of consolidation process. A large value for \theta will result in the radial flow ceasing in advance. Consequently, the consolidation will be completed only via the vertical flow. The following factors will lead to a faster consolidation rate, including a larger value of the initial permeability coefficient k_0, a smaller value for the well resistance factor \theta , weaker smearing effect, and larger replacement ratios of PVDs and piles.