运用组合投资理论的均值方差原则 ,分析了保险公司规避风险的问题 ;针对比例再保险的不同险种 ,建立了多目标规划模型并求解 ,确定了最优自留比例 ,并将实行再保险后的期望收益和方差与实行前进行了比较 ,认为结论适合于风险厌恶型的决策者 ;并对风险分散在证券市场与保险市场的差别进行了比较分析。 The principle of mean-variance of portfolio investment theory is used to analyze the problem of insurance companies avoiding risks. A multi-objective programming model is established and solved for different types of proportional reinsurance. The optimal proportion of retained earnings is determined and the expected return after reinsurance And the variance is compared with that before the implementation. The conclusion is suitable for the risk-averse decision makers. The differences between securities market and insurance market are analyzed comparatively.