Excavation foundation

The utility model provides an excavation foundation and relates to the field of power transmission and transformation projects. The excavation foundation comprises a body, a reinforcement cage, at least one anchor rod and at least one anchor bar. The anchor rods are arranged at the top of the body, each anchor rod is arranged in a manner of forming an angle with the horizontal direction, the reinforcement cage is arranged in the body, each anchor bar is arranged in the corresponding anchor rod, and one end of each anchor bar extends into the reinforcement cage in the body. The excavation foundation has the advantages that the inclined anchor rods are additionally mounted at the top of the excavation foundation, the anchor rods are utilized to share certain horizontal stress of the body of the excavation foundation, bending moment of the body of the excavation foundation is reduced, further the design size of the body of the excavation foundation is reduced, used materials of the excavation foundation is saved, and cost is lowered on the premise that enough uplift bearing capacity of the excavation foundation is guaranteed. The utility model further provides a construction method of the excavation foundation.