The invention relates to the field of building foundations, in particular to a treatment method of a recent dredger-fill silt foundation. The treatment method of the recent dredger-fill silt foundation includes three phases, namely surface vacuum dewatering joint-preloading, vacuum joint preloading and composite foundation. The treatment method is characterized by including the steps: in surface vacuum dewatering joint-preloading, treating the foundation by a, zoning; b, spreading a vacuum dewatering joint-preloading cushion; c, spreading a film and d, evacuating; in vacuum joint preloading, treating the foundation by a, spreading drain boards; b, spreading a film; c, performing vacuum joint preloading and d, performing low-energy forced ramming or impact rolling; and in the phase of composite foundation, adopting conventional composite foundation methods. The treatment method is safe in construction, short in construction period, effective in foundation treatment, low in construction cost, especially suitable for projects of land aggradation by reclamation, which are super-high in water content and ultralow in strength and need instant foundation treatment after filling.