The utility model relates to a fixing device of a gas cutting casing, which is used for connecting with a cross plate of a gas cutting casing.The gas cutting casing fixing device comprises a belt body and a pair of adhesive tapes.The belt body has a strip part and two extension widening parts integrally formed at both ends of the strip part, so that the width of each extension widening part is larger than the width of the strip part.The two ends of the adhesive tape are fixed end and free end respectively. The fixed end of the adhesive tape is integrally formed on the outer surface of the extension widening part. The free end of the adhesive tape is used to pass through the cross plate of the gas cutting sleeve and is reversely folded and bonded on the outer surface of the extension widening part, so that the two ends of the cross plate of the gas cutting sleeve are respectively located on the outer surface of the two extension widening parts.一種氣切套管固定裝置，用以與一氣切套管的橫板連接。氣切套管固定裝置包含有一帶體及一對黏帶。帶體具有一條狀部及一體成型於條狀部兩端的二延伸加寬部，使每一延伸加寬部的寬度大於條狀部的寬度。黏帶兩端分別為固定端與自由端，黏帶固定端一體成型於延伸加寬部外表面，黏帶自由端用以穿過氣切套管的橫板並且反折黏合於延伸加寬部外表面，以使氣切套管的橫板兩端分別位於兩延伸加寬部外表面上。
