水平撩壕整地是当前林业生产上普遍推广的一种科学方法;是促进林木速生,优质、丰产的重要措施。但在施工过程中往往不易达到水平,影响施工质量,造成水土流失。我们通过反复试验,采用等腰三角板测量,收到了较好的效果。它的特点是:制作容易,操作方便,简明易懂, Leveling trenches and site preparation is a scientific method generally promoted in forestry production at present; it is an important measure to promote the quick-growing, high-quality and high yield of forest trees. However, the construction process is often difficult to reach the level of impact on construction quality, resulting in soil erosion. Through repeated tests, we measured with isosceles triangles and got good results. Its features are: easy to make, easy to operate, easy to understand,