The invention discloses a soil plug extraction type suction anchor foundation and a construction method thereof. The soil plug extraction type suction anchor foundation comprises an electromechanicalcompartment, electromagnetic valves and a suction force barrel; the electromechanical compartment is a chamber defined by an upper closing plate, a lower closing plate and a steel cylinder, and is fixed to a top plate of the suction force barrel; a hole is formed in the center of a bottom plate of the electromechanical compartment and holes are annularly and uniformly formed in the periphery of the bottom plate of the electromechanical compartment; a submersible silt pump is arranged at the center of the chamber of the electromechanical compartment; a water inlet of the submersible silt pump is aligned to the hole in the center of the chamber; a water outlet pipe communicates with the outside; submersible motors are annularly and uniformly arranged in the electromechanical compartment; rotating shafts of the submersible motors penetrate through holes in the periphery of the lower closing plate and are connected with auger stems; the suction force barrel is of a steel cylinder structurewith the upper end closed and the lower end opened; an annular water guide conduit is arranged at the top plate in the barrel; two water inlets of the annular water guide conduit are connected with the electromagnetic valves; and the electromagnetic valves are connected with the steel cylinder of the electromechanical compartment through bolts. Soil plug extraction equipment is additionally arranged at the top of the suction force barrel so that the soil plug phenomenon in the suction anchor sinking and penetrating process can be eliminated effectively, and all equipment is integrated in theelectromechanical compartment so that overall recovery at the later stage can be realized.