本文在网络观察基础上归纳出up主公开恰饭的表现，并采用场域理论视角分析up主实行公开恰饭行为的原因。研究将公开恰饭定义为b站场域中up主将恰饭视频的性质与恰饭行为本身进行主动公开化的一系列行为；其表现包括恰饭可识别性的增强、恰饭详情的披露、恰饭原则的申明、对支持恰饭的鼓动四个方面。up主在b站场域中的恰饭行为主要受经济场域和场域内粉丝群体的制约与影响；实质上是up主在场域内以客观化的文化资本吸引与争夺符号资本，并以此向经济场域换取经济资本的行为。而up主公开恰饭行为的实质，是场域自主性的许可和粉丝惯习顺应下，up主积累文化资本、符号资本并最终获取经济资本的更好策略；与此同时也不可忽视up主惯习对其选择公开处理恰饭的驱动作用。

On the basis of network observation, this paper summarizes the performance of the candid advertising behavior of influencers on Bilibili and explain its reason from the perspective of field theory. In this study, candid advertising behavior is defined as a series of behaviors which make the advertising intention of involved videos and the advertising behavior itself undisguised, and which is done by the influencers in the field of Bilibili. Its performances include the enhancement of the identifiability of advertisements, the disclosure of the details of how they get sponsored, the statement of their principles of getting sponsored, and the encouragement of fans’ supports of the advertising video. The advertising behavior of influencers in the field of Bilibili is essentially the behavior of fighting for the symbolic capital based on their cultural capital, and exchanging economic capital from the economic field. It is mainly restricted by the force of advertisers and fans. The essence of their candid advertising behavior, is a better way for the influencers to accumulate cultural capital, symbolic capital and finally obtain economic capital with the possibility given by field autonomy and the adaptation to fans' habits. Also, the driving of influencers’ own habits is another motivation which should be noticed.