The invention discloses a hydraulic type die inspection device which is characterized by including a horizontal guide rail supported by two supports, the two supports are respectively arranged at the two ends of the horizontal guide rail and are hinged to the two ends, the lower parts of two arms are gradually separated and the lower ends of the two arms are provided with truckles, the upper parts of the two arms of the support of each side close up and are connected with the horizontal guide rail through a hydraulic rod, a left die holder slide block and a right die holder slide block are arranged on the horizontal guide rail, a static die connection board having a connection plane vertical to the direction of the horizontal guide rail is arranged under the left die holder slide block, a movable die connection board having a connection plane vertical to the direction of the horizontal guide rail is arranged under the right die holder slide block, heating devices are respectively arranged inside the static die connection board and the movable die connection board, and the left die holder slide block and the right die holder slide block are connected with a hydraulic cylinder. A casting machine is not occupied, the die casting production is not influenced, and die carrying and installation are convenient.