In this paper, firstly present situation of national surveying vertical datum is described and its imperfect is analysed. The methods of perfecting vertical datum are discussed finally.

• 大地水准面与深度基准面是测绘垂直基准面的主要因素。文中探讨了我国测绘垂直基准面的现状及其存在的问题,提出了改进测绘垂直基准面之拙见,以便在下一个世纪提到议事日程与同仁商榷。