Abstract: 【Purpose/significance】 This article studies the mechanism of user information interaction behavior in live streaming ecommerce through information ecology theory, providing relevant theories and research methods for analyzing user information behav⁃ ior on live streaming e-commerce platforms. It helps to promote the theoretical development of user information interaction in live streaming e-commerce and ensure the balance of the user information interaction ecosystem in live streaming e-commerce.【 Method/ process】 Research was conducted on the motivation of user information interaction behavior, ecological elements of information inter⁃ action behavior, the interaction relationship between various elements, and the operating rules in the ecosystem in live streaming ecommerce, ultimately forming a mechanism model of user information interaction behavior in live streaming e-commerce.【 Result/con⁃ clusion】 The study established a mechanism model for user information interaction behavior in live streaming e-commerce, clarified the behavioral motivations for user information interaction in live streaming e-commerce, the ecological elements of user information interaction behavior in live streaming e-commerce, and the ecological chain of user information interaction in live streaming ecommerce. 【Innovation/limitation】 provides a new theoretical framework and ideas for research in the field of live streaming ecommerce, enriching the theoretical system of user behavior research.