Abstract: Ecological threshold refers to the abrupt point at which the structure, attribute or function of an ecosystem changes from one stable state to another stable state on a certain time or spatial scale. Due to the limitation of climate, geography and other conditions, the environment in our country is fragile. At present, the degradation of ecosystem has become the main problem of sustainable economic and social development in our country. As a key index reflecting the steady-state transformation of ecosystem, ecological threshold can reflect the inflection point of the ecosystem from one stable state to another, and in-depth understanding of its concept and principle is of great importance for ecosystem integrated management and ecological security early warning. This paper elaborated the concept of ecological threshold and the conceptual model of ecosystem transformation, further discussed the classification of ecological threshold types by different scholars, summarized the relevant research methods of ecological threshold and the driving factors of ecological threshold, and also discussed the suitable application conditions, advantages and disadvantages of different ecological threshold research models. Relevant suggestions for future ecological threshold research were put forward: 1) To strengthen the quantitative assessment of ecosystem threshold, mainly exploring quantitative methods, that is, to improve the quantitative assessment model of ecological threshold, narrow the prediction error of the model, and timely warn the steady-state transformation of the ecosystem; 2) Explore the impact of spatial scale transformation on ecological threshold and the response threshold of ecosystem under the interaction of multiple driving factors, and establish the threshold transformation database of different spatial and temporal scales and different ecosystem types; 3) Apply the ecological threshold value to the actual integrated ecosystem management in the future ecological management practice, and put forward corresponding implementation suggestions from the perspective of managers and scientific researchers. At the managerial level, strict laws and policies should be formulated and enforced to ensure the sustainable use of resources and the effective protection of the environment. At the same time, it will play a leading role in establishing a multi-party cooperation platform to promote cooperation and communication among various stakeholders, jointly develop and implement sustainable development plans and projects, and achieve the goal of collaborative optimization and sustainable use of ecosystem services. At the level of scientific researchers, cooperation in interdisciplinary fields should be strengthened on the basis of relevant researches on ecological thresholds, so as to have a deep understanding of the function and stability of the ecosystem, and to develop new quantitative models of threshold values in order to provide scientific theoretical basis and data support for managers' decision-making.