三北防护林体系建设，１６年来取得了举世公认的巨大成就。为适应我国改革不断深化，三北防护林体系的内含更为深刻，建设内容更加丰富。青海省三北防护林体系建设以人工造林为主要内容。在造林速度、质量、树种、林种结构等方面发生了较大变化。分析和评价这一变化，使青海的三北防护林体系建设在新形势下，能够稳步、健康、有序地发展。 Three North Shelterbelt system construction, 16 years has made great achievements universally acknowledged. In order to adapt to the continuous deepening of China’s reform, the Three-North Shelterbie System contains more profound implications and a richer construction content. The Three-North Shelterbelt System in Qinghai Province mainly consists of artificial afforestation. In afforestation speed, quality, tree species, forest structure and other aspects of the great changes have taken place. Analyze and evaluate this change so that the construction of the “Three North” Shelterbelt System in Qinghai will develop steadily, healthily and orderly under the new situation.