The invention discloses a continuous sealed high-temperature mesh belt furnace. The continuous sealed high-temperature mesh belt furnace comprises a furnace body and a rack, the continuous sealed high-temperature mesh belt furnace further comprises a feeding propulsion mechanism, a double-door front discharging replacement chamber, a sealed mesh belt driving chamber arranged at the front end of the furnace body, and the continuous sealed high-temperature mesh belt furnace further comprises a furnace body water cooling section, a sealed mesh belt rotating chamber, a sealed discharging driving roller set, a double-door rear discharging replacement chamber, a material moving mechanism and a material circulating conveying mechanism arranged at the rear end of the furnace body. According to themesh belt furnace, all the parts are connected in a sealed mode, especially the parts connected with the front portion and the rear portion of the furnace body in a sealed mode, sealing of the mesh belt furnace is achieved, and compared with an open-type mesh belt furnace, the gas consumption can be reduced, and the atmosphere using cost is saved.