本文利用经典热力学理论，以可逆简单空气制冷循环为研究对象，借用有限时间热力学提出的品质因子作为优化目标，通过理论分析和数值计算，推导出了品质因子与影响参数间的解析式.通过优化压比给出了制冷循环的最优性能，分析了循环温比对制冷循环最优性能的影响.结果表明，选用品质因子作为优化目标进行性能优化，存在最佳压比使得品质因子取得最大值，而且优化结果保证了制冷率和制冷系数之间的协调，是一种较优的折衷方案.

 In this paper, a reversible simple air refrigeration cycle is studied by using classical thermodynamics, and the figures of merit proposed by finite time thermodynamics is used as the optimization objective. Through theoretical analysis and numerical calculations, the analytical formulas between figures of merit and influencing parameters are derived. By optimizing the pressure ratio, the optimal performance of the refrigeration cycle is given. The influence of cycle temperature ratio on the optimal performance of refrigeration cycle is analyzed. The results show that when the figures of merit is selected as optimization objective for performance optimization, there is an optimal pressure ratio to make the figures of merit get the maximum value. Moreover, the optimization results ensure the coordination between the cooling load and COP, which is a better compromise plan.