许多高温体如火焰 ,由于本身伴随着非常复杂的化学反应 ,辐射出的光谱非常复杂。这些光谱通常包括连续谱、谱线和谱带三部分 ,而且在许多情况下谱线非常密集。如果用谱线强度法测温 ,就会发现由于谱线非常密集 ,很难找到合适的孤立谱线。文章针对这些密集谱线 ,在特定条件下提出用多条谱线的总强度代替一条谱线的强度来测量温度的方法 ,改进了常用的相对强度法表达方式 ,使用密集谱线的总强度与另一条谱线强度的比值来计算温度 ,成功测量了固体推进剂火焰的温度分布 ,并将结果和热电偶测量的结果做了比较 Many hot bodies, such as flames, radiate very complex spectra due to their inherently complex chemical reactions. These spectra usually include the continuum, spectral lines and bands in three parts, and in many cases the lines are very dense. If you use the line intensity method temperature, you will find very difficult to find a suitable isolated line due to the very dense line. Aiming at these intensive lines, this paper proposes a method to measure the temperature by using the total intensity of several lines instead of the intensity of one line under certain conditions. The commonly used relative intensity method is improved. The total intensity of dense lines and Another line intensity ratio to calculate the temperature, the successful measurement of the solid propellant flame temperature distribution, and the results and thermocouple measurements were compared