The invention discloses an image segmentation method based on an Ising graph model, comprising the steps of: constructing the Ising graph model corresponding to the graph, a dual graph corresponding to the Ising image model and an extension dual graph corresponding to the dual graph; calculating a maximum weight value perfect match of the extension dual graph according to the system total energy of the Ising graph model; obtaining a minimum weight value cut of the Ising graph model according to the maximum weight value perfect match of the extension dual graph, and obtaining the segmentation result of the image according to states of the nodes in the Ising graph model corresponding to the minimum weight value cut. The simple and effective Ising graph model is adopted for segmenting the image, therefore, not only the calculation complexity is low and the efficiency is high, but also the segmentation accuracy is high; meanwhile, compared with the traditional image segmentation algorithm, the image segmentation method based on the Ising graph model does not have too strict condition limitation; According to the image segmentation method, while calculating the weight value energy of the edges of the Ising graph model, the gray information or color information or texture information of the nodes in the Ising graph model are fully utilized, and the relatively accurate segmentation result can be achieved by regarding the information as the basis of the image segmentation.