Abstract: Based on the theory of planned behavior, construct a theoretical analysis framework for the formation mechanism of farmers' green production behaviors, using a structural equation model and survey data on fertilization behaviors of 860 citrus growers in Sichuan and Chongqing, based on the perspective of farmers' perceived heterogeneity, it explores the formation mechanism of farmers' green production behavior from the logic of "internal and external factors-subjective perception-willingness-behavior". Research shows that farmers' knowledge and market environment perceptions have a significant impact on behavioral attitudes, subjective norms, and perceived behavioral control. Government incentives and regulations have a significant impact on behavioral attitudes, subjective norms. Organizational participation has no significant impact on it. Behavior attitude, subjective norms, and perceived behavior control have a significant impact on farmers' green production willingness. Perceived behavior control and green production willingness have a significant impact on farmers' green production behavior. Policy satisfaction has a positive regulating effect on the willingness and behavior of farmers 'green production. There are multiple paths to promote green production behaviors of farmers, among which the knowledge effect has the largest effect. Based on this, this article believes that improving farmers' green production knowledge, improving the service level of industrial organizations, strengthening agricultural market supervision, and improving government incentives and restraint mechanisms can promote farmers to implement green production behaviors.