The invention discloses a vertical combustion device which comprises a barrel, a ceramic fiber module, a flame detector, a combustion head, a ventilation opening and a natural gas inlet, wherein a high temperature resistant material layer is arranged on the outer wall of the barrel, the ceramic fiber mould is installed around the inner wall of the barrel, the combustion head is arranged in the barrel and installed at the bottom of the barrel, and the ventilation opening and the natural gas inlet are formed in the bottom of the barrel. The natural gas inlet is communicated with the combustion head, the ventilation opening is communicated with the inner wall of the barrel and is located below the combustion head, and the flame detector is installed on the barrel, penetrates through the barrel and the ceramic fiber module and is located above the combustion head. The vertical combustion device disclosed by the invention can effectively combust and treat natural gas generated by stratum and can reduce noise and thermal radiation generated to the surroundings in the combustion process, so that influence of noise and thermal radiation by natural gas sprayed and combusted on the surroundings is greatly reduced.