Metaanalysis is the highest level of evidence synthesis method in evidencebased medicine.It is applied in social comprehensive evaluation to establish an evidencebased comprehensive evaluation method.Its comprehensive evaluation research can provide more accurate, general and objective results than any single evaluation research.Therefore, the basic paradigm of comprehensive evaluation based on metaanalysis was discussed from seven aspects including evaluation program, data collection, literature quality evaluation, data processing, statistical analysis, sensitivity analysis and evaluation result analysis and report.Taking the accurate poverty alleviation satisfaction assessment as an example, the satisfaction of grassroots people with Poverty Alleviation Policies is evaluated comprehensively.The advantage of metaanalysis is that its decisionmaking process is based on more authentic and comprehensive evidence, which not only integrates the previous work, but also clarifies the gap and focus of future research.However, its own methodological problems and how to scientifically put different research results on the same measurement scale to avoid the mixing of "apple" and "orange" are still the challenges for all fields.