Abstract: In order to explore the driving mode and function of cooperatives in modern agricultural industrial parks, 21 national modern agricultural industrial parks with grain and oil industries, forest and fruit industries, and vegetable industries were selected as the research objects. Based on the information entropy model, the concentration degree of contract selection between farmers and cooperatives was introduced to study the characteristics, influence and formation reasons of contract selection. The results showed that modern agricultural industrial parks took land circulation or socialized service as the main contract type. Farmers’ contract selection had obvious differentiation characteristics, with the highest concentration degree being 0.84, and the lowest being 0.01. Concentration was screened into the stepwise regression model, whereby the grey correlation degree between concentration and the number of people driven by cooperatives was 0.866 5, in which case it can be used as an indicator to characterize the degree of driving by cooperatives. Through the analysis of Pearson’s correlation coefficient, differences in the level of industrial development, farmers’ resource endowments, and cooperative development levels were the main reasons for the differentiation of contract selection. Finally, suggestions for the development of the modern agricultural industrial park were put forward. Modern agricultural industrial parks should further explore the synergistic development mechanism of land transfer and socialized services. Different modern agricultural industrial parks should pilot and explore farmers’ cooperation models suitable for their own development. Modern agricultural industrial parks should focus on the transformation of agricultural scientific and technological innovations.