an introduction is made on calculating the explosion limitation of the purely organic burning gas and the mixture made of many organic burning gases by using oxygen coefficient, also it systematizes the old formulas in common use, and simplifies the calculation, at the same time, it offers the speed calculation for the explosion limitation of complicated organic burning gas, whose result is fit for the practice 摘要提出一种利用氧气系数计算纯净有机可燃气体和由多种有机可燃气体组成的混合气体爆炸极限的计算方法,对目前常用的经验公式进行了整合与修正,简化了对混合气体爆炸极限的计算,也提供了对复杂组成的混合有机可燃气体爆炸极限的快速估算,估算结果与实测值能较好吻合。