本文研究以单脉冲TEACO_2激光诱导乙烯-氧爆燃反应,测定了激光频率、反应气体总压力、C_2H_2和O_2的比例以及金属Pt-Rh及电解银表面对引爆功率阈值的影响.并以红外光谱分析了反应产物.发现当激光选频为00~0～10~10的P(14)支线时,所需的引爆阈值最小.当存在金属表面时阈值明显降低.反应主要产物为C_2H_2、CO、CO_2、H_2O,它们的相对含量与反应气体的总压及氧的相对含量有关. In this paper, the single-pulse TEACO_2 laser induced ethylene-oxygen deflagration reaction, the laser frequency, the total pressure of the reaction gas, the proportion of C_2H_2 and O_2 and the influence of metal Pt-Rh and electrolytic silver surface on the detonation power threshold were studied. The results show that the detonation threshold is the minimum when the P (14) branch with the frequency of 00 ~ 0 ~ 10 ~ 10 is selected, and the threshold is obviously decreased when there is metal surface.The main products are C_2H_2, CO, CO_2 , H_2O, their relative content of the total pressure of the reaction gas and oxygen relative content.