The invention discloses a mold pressing device for a curved surface wood-plastic plate. The mold pressing device comprises a mold pressing base, a preheating frame, hot plate boxes, a wood-plastic base plate, a mold pressing frame, mold pressing hydraulic stations, curved surface pressing plates, hydraulic cylinders, pressing plate guide rods, a controller and displacement sensors. The mold pressing base is provided with the preheating frame, the mold pressing frame, a lifting hydraulic station, the mold pressing hydraulic stations and a hot oil station. The multiple sets of hot plate boxes are assembled on the preheating frame in parallel. An upper heat shield is internally provided with a plate groove and the wood-plastic base plate. The top end of each curved surface pressing plate and a piston of the corresponding hydraulic cylinder are connected and fixed in a bolted mode. One displacement sensor is installed on the back side of each curved surface pressing plate. The controller is arranged on the lateral portion of the mold pressing frame and connected with a temperature sensor, the displacement sensors, a hydraulic valve set in the lifting hydraulic station and electrical signals of hydraulic valve sets of the mold pressing hydraulic stations. According to the mold pressing device for the curved surface wood-plastic plate, the wood-plastic base plate is subjected to mold pressing to form the curved surface wood-plastic plate through preheating, the weathering resistance is good, and the linear expansion coefficient is low; curved surface mold pressing can be freely conducted, and the problem that the curved surface performance of traditional wood is poor is solved.