The invention discloses an assembled integral concrete beam column node and a construction method thereof. The assembled integral concrete beam column node comprises a node core area, a first concretecolumn, a second concrete column, a node core area, a first concrete beam, a second concrete beam, a first lower transverse reinforcement, a second lower transverse reinforcement, a third lower transverse reinforcement, a first middle transverse reinforcement, a second middle transverse reinforcement, an upper transverse reinforcement and multiple longitudinal reinforcements; the first concrete column is positioned at the upper part of the node core area; the second concrete column is positioned at the lower part of the node core area; and the first concrete beam and the second concrete beamare positioned on the two sides of the node core area. The node is excellent in integrity and vibration resistance, and has the characteristics of simple structure, convenience to construct and large-scale production.