High-temperature, high-pressure, high-load-bearing and rapid-cooling heat treatment furnace

The utility model provides a high-temperature, high-pressure, high-load-bearing and rapid-cooling heat treatment furnace, and belongs to the technical field of heat treatment furnaces. The heat treatment furnace comprises an outer hearth and an inner hearth, the inner hearth comprises an inner container cover, a furnace door plug and an inner container bearing platform, the inner container cover is in sealing fit with the inner container bearing platform, the furnace door plug is located in a sealing space between the inner container cover and the inner container bearing platform, a tray is arranged on the furnace door plug, and heating parts are placed on the tray; the outer hearth or the inner hearth is driven by the motor to close the inner hearth and the outer hearth, start the vacuum pump and the heating element to heat parts, the inner hearth and the outer hearth are separated after heating is completed, and when the temperature of the parts is cooled to the set temperature, pressure relief operation is