To provide a dealing method of excavated surplus soil capable of flexibly coping with a change of an excavation position and faciliting the dealing of the surplus soil.

Excavated earth-sand is thrown into a self-propelled mixer 1, and a small amount of water and water-reducing agent (r) is mixed with the earth and sand to stir. The earth and sand to be stirred is pressurized by a pump 3 to convey them to the stationary earth and sand pit 6. The earth and sand is solidified by the stationary pit 6, and the earth and sand to be solidified is mounted on a truck to carry out by means of a carrying out machine.