在分析燃油液滴高压蒸发规律与常压下ｄ２蒸发规律间差别的基础上，考虑液滴表面移动速率和燃油物性参数的变化，建立了高压下计算液滴温度和蒸发速率的基本方程，并计算了正庚烷（Ｃ７Ｈ１６）在各种温度和压力下的蒸发特性．结果表明，高压有利于燃油液滴蒸发，但即使环境压力超过燃油的临界压力，其平衡蒸发温度也未必能达到临界温度 Based on the analysis of the difference between the law of high pressure evaporation of fuel droplets and the regularity of d2 evaporation, the basic equations for calculating droplet temperature and evaporation rate under high pressure are established by considering the changes of droplet surface moving velocity and fuel physical parameters Evaporation properties of n-heptane (C7H16) at various temperatures and pressures were calculated. The results show that the high pressure is good for fuel droplets evaporation, but even if the ambient pressure exceeds the critical pressure of the fuel, the equilibrium evaporation temperature may not reach the critical temperature