The invention discloses a multilayer thermal press hydraulic servo system with synchronous speed, position and pressure control and belongs to the technical field of artificial board machinery. The technical key points are that a thermal press multi-cylinder movement synchronous hydraulic servo loop is provided with a four-way electro-hydraulic servo valve; a thermal pressboard closing position precision adjusting hydraulic loop is provided with a three-position four-way solenoid directional valve connected with a servo hydraulic cylinder; the thermal pressboard closing position precision adjusting hydraulic loop is provided with a pressure sensor; and the pressure sensor is connected with a second hydraulic pump and the servo hydraulic cylinder. Hydraulic servo control technology is adopted and combined with the functions of all loops in the multilayer thermal press hydraulic servo system, the movement states of the servo hydraulic cylinder in different stages of board blank pressingare controlled, the synchronous movement precision of the servo hydraulic cylinder and the closing position precision and pressure of a thermal pressboard are controlled and adjusted precisely, onlinemonitoring of operation states of all hydraulic elements is achieved, the thickness precision and board quality of the board blank pressed by a multilayer thermal press are improved, and stability and reliability of work of the multilayer thermal press are ensured.