In recent years，China's food imports have increased substantially. This is a new issue that cannot be fully explained only from the perspective of supply side， and a satisfactory explanation cannot be provided from the perspective of agricultural trade liberalization. In this paper，the dynamic panel system GMM estimation is applied in the empirical analysis to explore the impact of the overlapping income distributions between China and import source countries on the number of China's food import varieties. The study found that under the premise of controlling per capita income in China，the degree of overlap in the distribution of income between China and the country of importation has a significant positive impact on the diversification of China's imported food. In addition，the study also found that the impact of the degree of overlap in the distribution of income between China and the import partner on the number of varieties of China's imported food largely differed from country to country. Although Chinese consumers prefer to import food products from developed countries，the increase in the overlapping degree of income distribution has a greater impact on the growth of food import variety from developing countries than that from developed countries. This article proposes to create conditions for importing more varieties of food from countries which have a high degree of income distribution overlap with China，and make a point of importing high-quality food from developed countries and importing varieties of food from developing countries.
- Import Variety，Income Distribution Overlap，Extensive Margin System，GMM