采用有限差分技术和压缩比例计算方法，对分别以Ｈ２和Ｃ２Ｈ４作燃料、以Ｈｅ和Ｎ２作稀释剂的燃烧驱动连续波ＤＦ激光器进行了数值模拟，给出了ＤＦ化学激光器燃烧室的平衡化学组分、光腔内平均小信号增益沿流场分布、激射谱线的强度分布、激光器功率和效率。计算结果表明：以Ｃ２Ｈ４作燃料、以Ｈｅ作稀释剂的ＤＦ化学激光器具有较长的可调节激活区，激光器的化学效率高，并且其激射谱线的强度分布更为集中 The combustion-driven continuous-wave DF laser with H2 and C2H4 as fuel and He and N2 as diluents respectively were numerically simulated by finite difference method and compression ratio method. The equilibrium chemistry group of DF chemical laser combustor was given. Min, the average small signal gain in the optical cavity along the flow field distribution, the intensity distribution of the laser line, the laser power and efficiency. The calculation results show that the DF chemical laser with C2H4 as fuel and He as diluent has a long adjustable activation zone. The chemical efficiency of the laser is high and its intensity distribution of laser line is more concentrated