The utility model discloses a consolidate novel three -dimensional drainage system of soft soil foundation, including vertical drainage system and horizontal drain system, the vertical drainage system beats in the soft soil foundation and establishes the vertical drainage board, and the drain bar becomes the rectangular lattice and arranges, the soft downcomer of at least one deck spring is transversely buried underground to transverse drainage system level in the soft soil foundation, the horizontal interlude of the soft downcomer level of spring is arranged in the rectangular lattice of vertical drainage board, laying depth is greater than drain bar top far from earth's surface distance, the soft the length of water pipe of falling of spring is greater than the total length of the rectangular lattice of vertical drainage board constitution, equidistant and the mutual parallel arrangement of the soft downcomer of spring, distance nearly after the soft downcomer of spring is buried underground and is accomplished and between the vertical drainage board is 0.2~0.4m, sealing pipeline and vacuum pump connection are passed through to the soft downcomer both ends of spring.