Taking the three-year gardening engineering technology major in higher vocational colleges as an example，based on accurate positioning the 4 core post ability training objectives by thorough investigation and analysis of the major，the paper has strictly decomposed out 14 basic post abilities and confirmed 51 typical tasks accordingly. According to the major post ability requirements and typical task objectives，the paper has reasonably designed 4 major core courses as well as 27 supporting courses so as to explore the construction of major core curriculum system of gardening engineering major in higher vocational colleges based on the working process and put forward reasonable suggestions specific to its effective application.