At present, although large-scale forest land has been restored and exploited in China through a large number of artificial afforestation, the tree species of the plantation are simple and the structure law,it has caused many ecosystem problems such as pests and diseases, soil fertility decline, etc. Therefore, ensuring the sustainable development of forests through near-natural management is of great significance. Near-natural forest stands can effectively resist natural disasters and pests, optimize soil physical and chemical properties, increase biodiversity, and improve the ecological and economic benefits of forests. Through the evaluation of near-naturalness, we can understand the actual growth status of the stand and construct a near-natural evaluation system that conforms to the conditions of the local site conditions, thus providing a reliable basis for near-natural management. According to the natural conditions of five typical plantation forests in the eastern part of Qinghai province, this paper aims at the near-natural management of plantation ecological public forests and tries to put forward the stand structure adjustment strategies and methods. The vertical structure, horizontal structure, herb coverage and its diversity, natural regeneration, species diversity, composition coefficient, diameter distribution, ratio of dead wood, and healthy wood are mainly selected from the aspects of stand structure, species composition, age and dead wood. Based on the combination of qualitative description and quantitative analysis, the near-natural unit circle π-value rule was applied to evaluate the natural characteristics of five typical forest stands and propose corresponding reform measures based on the evaluation results. Picea crassifolia-Betula platyphylla mixed forest (ω_PB=0.4786) is a far from nature forest. Such forests do not need too much artificial rearing under reasonable density. Populus cathayana-Betula platyphylla mixed forest (ω_BP=0.2664) is near plantation forest. In this kind of stand, the main activities are to cut down the Populus cathayana infested with insect pests, adjust the density and replant Picea crassifolia. Picea crassifolia-Populus cathayana mixed forest (ω_PP=0.2283) is near plantation forest. This kind of stand is mainly to cut off the Populus cathayana with serious disease and insect pest, adjust the density, and replant Betula platyphylla. Picea crassifolia-Larix principis-rupprechtii mixed forest (ω_PL=0.1872) is plantation forest. This type of stand is mainly to adjust density and replant Betula platyphylla. Picea crassifolia forest (ω_P=0.0190) is plantation forest. This type of stand is mainly for adjusting density and constructing Picea crassifolia-Betula platyphylla mixed forests. Through the evaluation and analysis of the near-natural condition, it provides a direct and reliable basis for local near-natural management. The method to adjust the stand structure is to first adjust the stand density by removing disturbing trees, and then create a mixed forest of coniferous and broad-leaved trees, among which Picea crassifolia-Betula platyphylla mixed forest is the main one.