Internal heating vertical waste gasification furnace; belongs to energy processing equipment, consisting of furnace body, burner, fan, mixed gas; competition device, spiral material propeller feeding device and slag discharge device, agitator, and throat; furnace body It is composed of two coaxial heat-resistant stainless steel pipes, which are divided into inner and outer pipes; the inner pipe is for garbage from top to bottom: drying section, throat, dry distillation section, gasification section, residue cooling section; outer and inner pipe There is only a mixed gas heating section, which coincides with the projection of the drying section, and the length passes through the throat; the garbage is fed to the drying section through the feeding device, and the mixed gas heating section is indirectly heated through the pipe wall to release water vapor, and enters the dry distillation section. The water gas generated in the gasification section is heated to release pyrolysis gas, which enters the gasification section and is directly heated by the burner, and reacts with the water vapor sent from the garbage residue section to generate water gas, completing the full gasification process; the furnace can also be used for coal and biomass The full gasification.