Door by door unit, door lifting mechanism and the door latch components. Door casing made of welded steel plate with a solid frame structure, within the compression module with refractory fiber laid up together, require good insulation properties furnace temperature controller, and light weight. Door lifting device with electric devices, mainly from the door frame, door lifting beams, reducers, sprockets, shafts and bearings and other parts furnace, door by door movements to drive forward and reverse gear on the gear unit lift. Door lifting reducer comes with brakes, can effectively prevent the lift door displacement process. Door clamping device uses advanced compression spring-type structure, when the stove needs to be upgraded, the dead weight of the door by door lever will automatically release, and removed some distance level rise, fall into place when the oven door, the door down when the trolley pulley pressing need to above, by the force of the spring lever through the door to compress the seal is moved into the horizontal state, the pressing means of this structure the fiber plane of furnace door on cotton No friction between, with good safety performance, mission chief characteristics. In recent years, domestic vacuum heat treatment furnace equipment and technology is developing rapidly. China has developed a single-chamber vacuum high pressure gas quenching furnace, convection heating and high pressure gas quenching vacuum furnace aluminum vacuum brazing furnace; foreign developed a vacuum furnace gas, semi-continuous and continuous vacuum furnace, vacuum furnace fluidized multipurpose vacuum furnace high-temperature ultrahigh vacuum furnace, vacuum sintering furnace and vacuum furnace production lines. This paper briefly describes the above equipment box-type furnace, and proposed the development trend of vacuum heat treatment furnace technology. In recent years, laboratory furnace, vacuum sintering furnace processing range, operating temperature and installed furnace capacity and control technical aspects of both new progress, industrial furnace can be used for stainless steel, tool steel, carbide, ceramic, iron boron materials such money sintering treatment, industrial application prospect. Furnace 97, Longkou laboratory furnace (certified), provided by Longkou experimental furnace Furnace. Longkou experiment Furnace (www.lk-dianlu.com) is a leader in Yantai, Shandong Province, electric equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Longkou laboratory furnace leadership with the staff warmly welcome all inquiries negotiations to create experimental furnace Longkou a better future.