智能媒体时代下，进一步探究信息茧房效应对用户群体极化行为意愿的影响，能为构建良好的社交媒体平台生态提供建议。文章基于“刺激-机体-反应”框架与信息生态理论，从信息茧房的同质化特征内涵出发，分析信息茧房形成机理并构建信息茧房效应下用户群体极化作用机理模型，利用问卷调查收集样本，通过结构方程模型展开实证研究。研究结果显示，信息同质化、选择性接触、群际情绪和社会比较频率在用户群体极化行为意愿形成过程中发挥重要作用。同时，用户态度极化也是信息茧房效应下用户群体极化行为意愿的影响因素。

In the era of intelligent media, exploring the impact of the information cocoon effect on user behavioral willingness in group polarization can provide suggestions for building a good ecosystem of social media platform. This paper was conducted based on the "stimulus-organism-response" framework and the theory of information ecology. Starting from the homogenization characteristics of the information cocoon, the study analyzed the mechanism of information cocoon formation and constructed a model of user group polarization under the information cocoon effect. The study then collected samples through questionnaire surveys and conducted empirical research through structural equation modeling. The results show that information homogenization, selective contact, inter-group emotion and social comparison frequency play an important role in the formation of users' behavior intention in group polarization. At the same time, user attitude polarization is also an influential factor of user group's behavioral willingness to polarization under the information cocoon effect.