bilibili是ACG亚文化氛围浓厚的弹幕视频网站，被认为是二次元的世界。从2016年开始，陆续有纪录片在B站走红，获得政府相关机构和B站的关注。笔者看到B站这个二次元平台对纪录片传播的特殊性，选取在平台借力明显的《寻找手艺》作为研究对象，将纪录片放在产生于ACG亚文化的弹幕文化的研究体系中，通过观察法、定性分析法、举例法具体分析研究对象在B站的弹幕，并与爱奇艺视频网站的弹幕进行比对研究，提炼出纪录片在B站传播的特色并试图获得规律，在这个基础上为以后纪录片在B站传播实现效益的最大化提出理论支撑和现实建议。

Bilibili is a barrage video website with strong ACG subculture atmosphere, which is considered to be the world of the ACG. Since 2016, a series of documentaries have gone viral in bilibili, gaining attention from relevant government agencies and bilibili. The author notices the particularity of communication on the documentary of bilibili，an ACG platform, selects "looking for crafts" reaping the benefits from the platform as the research object, puts the documentary in research system of barrage cultural，produced in ACG subculture, analyzes concretely barrage of the research object in bilibili through the observation method, qualitative analysis, examples , and compares iQIYI`s barrage with bilibili`s barrage, extracts documentary communication characteristics in bilibili and tries to get rules, puts forward theoretical support and practical suggestions for achieving maximum efficiency of documentary`s communication in bilibili on this basis.