淮南煤田二叠系是以三角洲—滨岸平原相为主的沉积。本文运用地层基准面原理，通过岩心、测井资料的综合分析，对淮南煤田二叠系进行了不同周期地层基准面旋回分析，识别出短期、中期、长期三种规模的地层旋回。通过对比分析，建立了该区高分辨层序地层格架。研究表明，聚煤作用出现于基准面旋回的一定位置上，叠置在长期基准面下降时期的中期基准面旋回后期是成煤的最有利时期 The Permian in Huainan coalfield is a sedimentary facies dominated by delta-shore plain. Based on the principle of stratum base and the comprehensive analysis of core and well logging data, this paper analyzes the formation cycle of the Permian in different periods in Huainan coalfield, and identifies the stratigraphic cycles of short, medium and long term. Through comparative analysis, the high-resolution sequence stratigraphy framework has been established. The results show that coal accumulation occurs at a certain position on the basement cycle, and the late stage of mid-term basaltic cycle superimposed on the long-term base-level fall period is the most favorable period for coal formation