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To improve the efficiency and benefits of the agricultural product supply chain while ensuring its smooth operation and sustainable development, we have established a performance evaluation index system for the agricultural product supply chain in the context of building an agricultural powerhouse. The evaluation model combines principal component analysis, data envelopment analysis, and ideal solution methods, forming a PCA-DEA-TOPSIS three-stage integrated model. In this paper, taking Sichuan Province as an example, we assess the agricultural product supply chain performance of 21 cities (prefectures) in the province and propose several improvement strategies.