The invention relates to a water resource scheduling method based on land-atmosphere coupling, and the method comprises the following steps: 1, carrying out the rainfall forecast according to a numerical atmospheric model WRF; 2, setting the parameters of a Hebei rainfall flood model; 3, carrying out the rainfall forecast, and driving the Hebei rainfall flood model to carry out the radial flow forecast; 4, determining a water resource scheduling scheme based on the radial flow forecast. Starting from the improvement of the radial flow forecast precision and the prolonging of the radial flow forecast period, the invention provides the method. The method can provide sufficient time for a decision maker to make a water resource scheduling scheme, can judge the water storage and discharge amount of a reservoir more precisely, makes the most of limited water resources, gives the fullest play to the benefits of water supply, is especially suitable for a north region which is the most affected by the activities of human beings, can achieve the rolling forecast of rainfall and radial flow through combining with weather forecast, provides a reasonable water resource scheduling basis for a water department, and is very universal.