Abstract Aiming at the problems existing in the safety evaluation of water resources, such as partial evaluation indexes, the omission of single index membership information and subjectivity problem of determining weight, In a typical karst area-Guizhou province as an example, combining with the characteristics of water resources in karst region, based on conceptual framework of driving force-pressure-state-impact-response-management (DPSIRM) to build evaluation index system of water resources security, with the help of grey-set pair model to make quantitative evaluation of Water security of Guizhou province in 2005~2005, The results show that: the water security in Guizhou in 2005 and 2006 in the criticality safety state, 2007~2012 in a safe state, water security in Guizhou to present the overall good posture. the state of water resources and water resources management ware the important factors affecting the safety of water resources. Continued to adjust the economic structure and transformation of the mode of growth at the same time, improve the utilization efficiency of water resources, increase investment in infrastructure construction of water resources, strengthening the construction of water resources management system and improve the implementation of water resources management system, these were the fundamental guarantee of the water security in Guizhou; The applicability of the evaluation model and index system was stronger, the evaluation results more objective, provided a new perspective and a new method for the safety assessment of water resources in karst region.
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