Abstract: Seabed pipeline trenhing with plough is an experienced construction technique. The article evaluates the development and trend of seabed pipeline plough, analysed the structure types and features, discusses the key points which should be considered in design of the whole structure, indicates that the plough is a comprehenssion of modern science and technolosy, an important part of ocean pipeline construction, the development of plough which is suitable for sea floor in our country should be on the basis of absorption and digestion of existing technical achievment abroad.