本文以一个具体案例为主线,从构成要件和立法意图两方面分别对案件进行分析,并得出结论,向读者阐述判定自首时要考虑的因素,得出了在案件发生后主动向公安机关报案之后得知自己行为犯罪,其报案行为是否构成自首的结论。 In this paper, a specific case as the main line, respectively, from the constituent elements and legislative intent, respectively, the case analysis, and concluded that the reader to explain the factors to be considered when deciding to surrender, came to the case after the initiative to report to the public security organ Later learned that their own behavior crime, the report of the act constitutes a conclusion of voluntary surrender.