自由是人的基本权利,是实现其他权利的基础和前提。羁押,作为直接限制或剥夺犯罪嫌疑人、被告人人身自由的措施,决定羁押应当慎之又慎。在当前出台捕后羁押必要性审查机制是具有现实的必要性。文章拟从检察机关视角出发,对捕后羁押必要性审查机制进行简要的论述,提出在司法实践中完善该机制的几个构想。 Freedom is the basic human right and the basis and premise for the realization of other rights. Detention, as a direct measure to limit or deprive the suspects, defendants personal freedom measures, decided to detain should be cautious. The current review of the necessity of arrest after arrest is a realistic necessity. The article intends to proceed from the perspective of procuratorial organs, reviewing the necessity review mechanism for the post-arrest detention, and proposes several conceptions of perfecting the mechanism in judicial practice.