True, objective and impartial course and achievement evaluation is the requirement of modern higher vocational education, and can avoid "high scores and low abilities" of students to the maximum. This article focuses on expounding the "two connections and five combinations" dual evaluation modes of higher vocational gardening technology major students' achievement on practical courses, namely connection between major and industry; connection between achievement and occupation; combination of on-campus and off-campus teachers' evaluation; combination of process and results evaluation; combination of course evaluation and professional skill appraisal; combination of students' self-evaluation and teachers' evaluation; combination of examination paper and non-examination paper evaluation; combination of group and individual evaluation.