笔者描写了医学技术评估中循证医学的后评估原理与方法，并阐明了后评估的内涵，即把相同的研究按照一定的科学原则综合在一起，得出结论或提出新的研究计划的一种过程。后评估有一个较完整的文献评阅框架，包括研究的背景、目的、文献检索、出版偏差、研究结果的测量、数据的质量，以及怎样处理研究结果的齐同性与多个研究结果的合并。 The author describes the principles and methods of post-assessment of evidence-based medicine in medical technology assessment, and clarifies the connotation of post-assessment, that is, to integrate the same research in accordance with certain scientific principles, draw conclusions or propose a new research plan. The process. Post-evaluation has a relatively complete review framework for literature, including the research background, purpose, literature search, publication bias, measurement of research results, data quality, and how to handle the homogeneity of research results and the merger of multiple research results.