本文采用燃油主份模型计算了汽油和含氧混合燃料的挥发特性，研究了在汽油中掺混含氧燃料对燃油挥发特性的影响。计算结果表明，燃油主份模型能很好地反映出由于氧原子的极性造成的含氧燃料挥发特性的非线性特点；在汽油中掺混含氧燃料可以有效地改善燃油的挥发性，其改善效果与汽油中掺混含氧燃料的比例成正比 In this paper, the main fuel model was used to calculate the volatilization characteristics of gasoline and oxygenated mixed fuels. The effect of blending oxygenated fuels on gasoline volatilization was studied. The calculation results show that the main model of fuel can reflect the nonlinear characteristic of oxygenated fuel volatilization due to the polarity of oxygen atoms. The blending of oxygenated fuel in gasoline can effectively improve the volatility of fuel, The improvement is proportional to the proportion of oxygenated fuel blended in the gasoline