1 引言 验潮记录是当地海面相对于验潮基点——验潮水准点的变化。因此根据验潮记录分析计算得到的是局地相对海面变化。由于各地地壳垂直运动情况不同,各验潮水准点的升降运动情况各异,因此无法直接将这些局地相对海面变化相互比较,得到整个沿海海面变化趋势的估计。为此,统一基准,对各验潮水准点作统一的陆地垂直运动的订正,是研究大区域平均海面变化所不可或缺的一项基础工作。迄今为止,我国大部份有关中国沿海海面变化研究的 1 Introduction tide record is the local sea relative tide point - the tide point changes. Therefore, according to the tide record analysis and calculation is the relative changes in the sea surface. Because of the different crustal vertical movements, the leveling movements of each tide gauge are different. Therefore, it is impossible to directly compare these changes of relative sea level with those of the sea level and obtain the estimation of the variation trend of the entire coastal sea level. Therefore, reunification of the benchmark and the reorganization of the vertical movement of the land on a uniform basis at various tide-hit points are an indispensable basis for the study of the average sea level change in large areas. So far, most of China’s studies on the change of sea surface in China’s coastal areas have been conducted