The invention discloses an efficient environmental protection casting device facilitating demoulding. The efficient environmental protection casting device comprises a cope flask, a drag flask, a cope flask fixing bracket and a drag flask supporting platform; the cope flask fixing bracket comprises four upright columns arranged symmetrically; the middle part of each upright column is provided with a hydraulic lifting sliding block; each hydraulic lifting sliding block is connected with a cross arm; one end of one cross arm is hinged to one hydraulic lifting sliding block through a hinge correspondingly; the other ends of the cross arms are hinged to the cope flask through hinges; a hydraulic compacting machine is arranged at the tops of the upright columns; the four corners of the bottom of the drag flask supporting platform are each connected with a lifting supporting rod through a hinge; the drag flask is placed on the drag flask supporting platform; baffles are arranged among the upright columns; an operation door is formed in one of the baffles; a top plate is arranged at the tops of the upright columns; the baffles and the top plate form sealed space; an exhaust fan is arranged on the top plate; and the internal surfaces of the cope flask and the drag flask are coated with surfactants. The efficient environmental protection casting device is high in integration level, convenient to use, low in manufacturing cost, good in shaping quality, and high in efficiency, cooling efficiency and casting precision, and facilitates flask demoulding.