目的 针对BA无标度网络模型中择优连接方式，真实描述果蔬冷链配送网络演化机制的局限性。方法 在分析果蔬冷链配送网络特性的基础上，选取果蔬损耗风险系数和送货及时率作为节点择优连接的测量指标，考虑节点退出及边消失的方式，构建果蔬冷链配送网络演化模型。结果 果蔬冷链配送网络的度分布仍服从幂律分布，具有无标度性，且模型相关参数对度分布和幂律指数产生了一定影响。 结论 对BA无标度网络模型的择优连接进行改进，能真实反映果蔬冷链配送网络的演化机制，为冷链企业合理利用冷链配送中心，防范果蔬冷链配送网络突发失效风险提供帮助。

The work aims to describe the limitations on evolution mechanism of cold chain distribution network for fruit and vegetable in view of the preferred connection method in the BA scale-free network model. Based on the analysis of the evolution characteristics of fruit and vegetable cold chain distribution network, the loss risk coefficient of fruit and vegetable and timely delivery rate were selected as the measurement indexes of node preferred connection, and the evolution model of fruit and vegetable cold chain distribution network was constructed by considering the node exit and edge disappearance. The degree distribution of fruit and vegetable cold chain distribution network obeyed power law distribution and had scale-free characteristics, and the related parameters of the model had certain influence on degree distribution and power law index. Improving the preferred connection of BA scale-free network model can truly reflect the evolution mechanism of fruit and vegetable cold chain distribution network, and provide great help for cold chain enterprises to make rational use of cold chain distribution centers and prevent sudden failure risk of fruit and vegetable cold chain distribution network.