Ecological monitoring of forests stands is an important issue, because it allows to delve deeper into the issue of the state of forests and consider many problems in the field of forest management and pathology. Forests are an important formative element of terrestrial ecosystems of various ranks. Intensive exploitation, coupled with natural aging processes, inevitably leads to forest weakening and inability to fulfil their ecological functions. This is especially noticeable on the territory of the Priamursko-Primorsky forest region where a large area elongated from the north to the south presents a variety of natural and climatic conditions forming their own biocenosis. In case of loss, due to poor forest pathological or sanitary condition, the forest is unable to perform its functions. The process of forest cutting down will inevitably lead to damage to the ground cover, shrubs and grasses growing in the forest, changes in the microclimate, water balance of the soil. Changing key conditions can lead to a change in the ecological system. Therefore, today the issue of researching and monitoring the ecological state of the forest is relevant, allowing understanding the level of awareness about the state of the forest fund of the Russian Far Eastern region.