In the process of vacuum preloading consolidation of soft soil foundation,because of the hydraulic fill mud spread and deposit complicatedly,drainage plate and mud layer at the bottom of the shallow foundation reinforcement area between the friction force is too small,resulting in soil entrainment,lead to “returning belt” phenomenon.Through the mechanical balance calculation and engineering practice,we take vibration,water injection and shoe transformation method to change the drainage plate bottom plate head structure or increase load measures,effectively solve the construction brought back the phenomenon of zone of plastic drainage plate shallow foundation.The measures can improve the plastic drainage plate design quality and efficiency.