Eco-hydrological processes, coupled ecological processes and hydrological processes in the earth surface system, are the basic developing and evolving processes of the earth surface system. It is front-burner and difficult scientific issue for eco-hydrology to establish sustainable eco-hydrological models in the earth surface system via explore eco-hydrological characteristics and processes at different temporal and spatial scales, achieving sustainable management of water resources and water environment. Eco-hydrological models are a kind of powerful tool to study eco-hydrological processes. They are capable of coupling ecological processes with hydrological processes, revealing the interaction mechanism of ecological processes and hydrological processes, and illustrating the relationship between the two kinds of processes by describing ecological processes and hydrological processes at different scales. On the one hand, the rise of the eco-hydrological model benefits from the progress of acquisition technology for spatial information, such as geography information systems and remote sensing which provide detailed spatial distribution of watershed underlying surface. On the other hand, the appearance of distributed hydrological model makes it possible to couple the ecological models of field scale at each spatial unit. Up to now, the research on ecohydrological model of watershed of scale has obtained some staged achievements including one-way coupled model, conceptual model, semi-physical process model and physical process model. At present, the eco-hydrological model of watershed scale has been widely used in the eco-hydrological processes of forest watershed, the response of ecohydrological processes in the watershed of arid and semiarid region to climate change and the impact on crop yield of land-use and land-cover change. The existing eco-hydrological models of watershed scale have some problems including eco-hydrological interaction, watershed scale transformation, parameters estimation, input data, the simulation accuracy and the problem of uncertainty, which are the focus of the study on eco-hydrological models of watershed scale in the future. The research on eco-hydrological model of watershed scale depends on the development of discipline and the theory of eco-hydrology. In order to acquire breakthrough of model theory, the research on eco-hydrological model of watershed scale should combine the latest progress of eco-hydrology. This paper reviewed the progress of eco-hydrological models at watershed scale, meanwhile demonstrated the research state of eco-hydrological models at watershed scale in inland river basin by combining some research results from the major research program entitled " Integrated Study of Eco-hydrological Processes in the Heihe River basin" founded by National Natural Science Foundation of China.