不作为犯与作为犯一起构成了犯罪构成要件中的实行行为,同时不作为犯又可以分为纯正不作为犯和不纯正不作为犯。先行行为作为不纯正不作为犯的义务来源,在学界已经没有很大的争议。但是,作为先行行为本身,其性质、范围等概念内涵却一直存在争议。本文就先行行为的一些概念内涵,提出了相关见解。 Inaction as a crime and as a crime together constitute a crime in the elements of the implementation of the act, while not as an offense can be divided into pure non-conduct and impure omission. As a source of obligation for impropriety of preemptive conduct, there has been no major controversy in academia. However, connotations such as its nature and scope have always been controversial as a precedent. In this paper, some conceptions of the first act of behavior, put forward the relevant opinions.