The mesh belt atmosphere protection bright furnace is a continuous operation type heat treatment production line, which is a continuous automatic control heat treatment furnace. During the heat treatment process, the workpieces do not collide with each other and pass smoothly and evenly through the heating furnace with a protective atmosphere, so that the workpieces achieve surface brightness and meet the requirements of the heat treatment process under the action of the protective atmosphere and high temperature. This furnace has the advantages of high automation, easy parameter adjustment, low labor intensity, no environmental pollution, and energy conservation. It can be widely used for heat treatment of "medium" and "small" type workpieces produced in large quantities in the scissors and blade industry, light industry machinery, textile machinery, weapons industry, and electromechanical industry.