运用双结构方程验证M E.波特钻石模型对中国设计产业竞争优势解释效用，以及各因子之间相互影响。运用基于产业现实表现和重要性评价李克特量表数据，构建两个结构方程模型，研究表明：中国设计产业不存在要素和投资驱动；双钻石模型四个决定因子之间存在显著相关关系，但重要性评价模型中四个因子和政府作用相关都显著。双模型能够解释中国设计产业竞争优势，但政府作用是重要性评价模型决定因子而不是现实表现模型决定因子，证实通过创新驱动提高竞争优势需要政府直接作用。

this paper verifies the explanation utility of M.E. Porter’s diamond model and the interaction effect among its factors in China's design sector applying dual structure equation models with Likert Scale data based on actual performance and importance evaluation of the sector. Analysis reveals that in China's design sector there exists no factor-driven and investment-driven stage; and there is significant interaction among the 4 determinant factors in two diamond models, but more significant interaction among the 4 determinant factors and government is existing in the important evaluation model. both models can explain the China's design industry's competitive advantage, but the government's role is a decisive factor in the important evaluation model, and not in the actual performance model, validates the government's direct role, which is necessary to improve competitive advantage through innovation-driven.