The invention discloses a treatment method of a container yard foundation. The method comprises the steps that firstly, before removing and digging, dynamic sounding is carried out for determining the soft foundation treatment dredging depth; temporary water draining work is carried out, a total station and a level gauge are used for determining the area and the depth of replacement, a gray line is sprayed, the method that an excavator is matched with the dump truck transportation direction is used for removing soft soil, during backfilling, an automobile conveys materials to the foundation bottom to be stacked in a separated manner, a bulldozer is adopted for carrying out bulldozing, during backfilling, the padding elevation is controlled in a layered manner according to the pavement parallel line, layered paving and layered grinding are carried out, a vibration road roller is adopted in material filling for grinding, finally, after filling self-inspection is qualified, the result is reported to a supervising engineer for casual inspection, and after a qualified certificate is obtained, the upper layer is filled; a removing replacement method is adopted for carrying out foundation treatment, a gravel layer and a rubble layer are backfilled in a layered manner, the construction technology is reasonable in step design, repeated real-time measuring and detection are combined, scientific construction is achieved, the bearing capacity of the foundation can be improved, and the settling volume is reduced.