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莺歌海盆地是南海北部陆架盆地的重要组成部分．本文根据ＭｃＫｅｎｚｉｅ（１９７８）的均匀拉张模型，并采用Ｍｉｄｄｉｅｔｏｎ（１９８４）在地震地史分析中的做法，由地震剖面资料得到进行去压实校正所需的地层资料．经过去压实校正和回剥处理，得出了盆地典型剖面的地层埋藏史和热沉降史．然后，由热沉降史通过与ＭｃＫｅｎｚｉｅ的理论曲线的对比，求出拉张因子分布．结果表明，莺歌海盆地为符合ＭｃＫｅｎｚｉｅ模型的盆地，南海的两次扩张在莺歌海盆地形成过程中有明显的反映．
Yinggehai Basin is an important part of the northern South China Sea shelf basin. According to McKenzie’s (1978) uniform tensile model and using the method of Middieton (1984) in the seismological history analysis, the stratigraphic data needed for de-compaction correction are obtained from the seismic profile data. After de-compaction correction and back-stripping processing, the stratigraphic burial history and thermal settlement history of typical sections of the basin are obtained. Then, from the history of thermal subsidence, the tension factor distribution was obtained by comparing with the theoretical curve of McKenzie. The results show that the Yinggehai Basin is a basin conforming to the McKenzie model, and the two expansion in the South China Sea are clearly reflected in the formation of the Yinggehai Basin.