Abstract: ObjectiveChina is the world's largest consumer of potassium salt. However, due to the poor endowment and low grade of domestic potassium salt resources, it has long faced the challenges of supply and demand imbalance and high dependence on imports. Conducting research on the supply and demand situation and security guarantee of potassium salt in China is of great significance for ensuring the security of potassium salt in our country and responding to international challenges.MethodsThis paper systematically analyzes the production status and supply-demand situation of China's potash resources, combines qualitative and quantitative analysis, and uses the departmental prediction method and the grey system theory (GM1, 1) model to predict China's potash consumption from 2025 to 2030. ResultsThe prediction results show that the value obtained by the grey system theory GM(1, 1) model is close to the neutral prediction value of the departmental prediction method. It is predicted that China's potash (K₂O) consumption in 2025-2030 will be 17.2022 million tons, 18.0518 million tons, 18.9482 million tons, 19.8944 million tons, 20.8934 million tons, and 21.9485 million tons respectively. China's potassium resources are facing problems such as resource shortage, over-heated development, and difficulty in increasing production.ConclusionsIn the future, it is necessary to increase the intensity of scientific and technological innovation, actively participate in global potash development, and strengthen the comprehensive utilization of lithium, magnesium, boron and other resources in salt lakes to achieve the maximization of resources and the diversification of industries..