The invention discloses a plate hot press, which comprises a base plate, hydraulic systems, guide rails and an oil cavity. Supporting columns are fixed to the top end of the base plate, the top ends of the supporting columns are connected with a top plate, the hydraulic systems are mounted at the top of the top plate, limiting plates are arranged on the front sides and the rear sides of the base plate and the top plate correspondingly, the guide rails are arranged on the inner sides of the limiting plates, sliding blocks are mounted on the outer sides of the guide rails, fixing rods are fixedto the outer sides of shaft rods, external-connecting rods are mounted on the front sides and the rear sides of press fit partition plates correspondingly, the oil cavity is formed inside the base plate, and the outer side of the oil cavity is connected with an oil pump. According to the plate hot press, oil can be preheated, rapid processing and use are convenient to ensure, rapid backflow of hotoil is facilitated, thus energy is saved, meanwhile, the side is convenient to arrange, plate leakage is avoided, long-term stable separation between the press fit plates can be ensured, plate addingis facilitated, and long-term use is ensured advantageously.