本文阐述了光纤测温技术依据的原理，给出了多通道瞬时光纤测温装置的构成利用该装置对液体炸药硝基甲烷的实际爆轰温度及其光谱发射率进行了实验测量，结果分别为３７００±１００（Ｋ）和０７１±０１５ This paper describes the principle of optical fiber temperature measurement based on the principle of multi-channel instantaneous optical fiber temperature measurement device used in the device of liquid explosives nitromethane actual detonation temperature and spectral emissivity were measured, the results were Was 3700 ± 100 (K) and 071 ± 015