Abstract: The construction of high-level major group is the core of the construction of "double high-level" in vocational education, and the curriculum system is the key to the construction of major group. This paper analyzes the characteristics of OBE and work process oriented development curriculum system, and constructs a new model of curriculum system based on the principle that "training objectives and professional posts are connected with industrial chain, and work process learning fields are coupled with curriculum system". And put forward a new method of constructing "1 +X" diploma certificate integration curriculum system with "one benchmarking and three correction " In this mode and method, the curriculum system of water conservancy and hydropower construction engineering major group is constructed, which can provide reference for other high-level major group curriculum system.