Vertical vacuum carbonization furnace uses graphite as healing element with carbon heating environment, which max. temperature can reach above 1600°C. It is used for high temperature carbonization and cracking treatment of C/C composite material, ceramic matrix composite material and carbon fiber insulation material. And the vertical carbonization tubefurnace can also adopts all metal hot zone without carbon heating environment, which max. temperature is 1100. It is used for debinding and sinter of special materials in aerobic environment.