通过梳理总结基于紧密型医疗联合体（以下简称医联体）的“一免三优先政策”模式，对现有的医联体在基层消化道肿瘤筛查中的实施现状及问题进行实地总结，结合相关数据，对实际效果、优缺点等情况进行对比分析，总结其发展所取得的经验和教训，为促进医联体发展提供数据支撑、理论参考以及对策建议。同时丰富关于医联体的研究内容，为今后医联体的研究提供参考。

The purpose of this study is to summarize the “One Exemption and Three Priority Policy” model based on tight medical consortia （hereinafter referred to as “medical consortia”），and to conduct field research on the current implementation status and problems of existing medical consortia in primary gastrointestinal tumor screening. Combined with relevant data，the actual effects，advantages and disadvantages are compared and analyzed，and the experience and lessons learned from their development are summarized，providing data support，theoretical reference，and countermeasures for promoting the development of medical consortia. At the same time，the research content on medical consortia is enriched，providing reference for future research on medical consortia.