分析了锅炉烟道内烟温测量值偏低的原因及其影响因素。根据热交换理论提出了较完善的计算锅炉烟道内测量偏低值的理论方法 ,给出了几个计算示例 ,并对测量烟温的热电偶安装和维护注意事项作了说明 The reason why the measured value of flue gas temperature in boiler flue is too low and its influencing factors are analyzed. Based on the theory of heat exchange, a more complete theoretical method for calculating the low value in the boiler flue is proposed. Some calculation examples are given, and the installation and maintenance precautions for measuring the temperature of the smoke are described