技术创新是集技术供给和市场需求于一体的技术活动和经济活动。文章采用动态演化博弈方法分析技术供给、市场需求和技术创新之间的关系，得出市场需求规模达到某一临界值时技术创新得以实现。接着将这一思想引入产品内分工背景下的全球产业链中，得出在产业链各个环节也存在需求规模临界点。尤其通过本土需求规模构建一条基于我国产业发展需求的价值链，可以培育我国的高技术产业、增强产业链对外界反应的弹性，从而提高我国的技术创新能力，高技术行业的统计数据验证了以上推论。

Technological innovation is not only a technical activity but also an economic activity which is a set of technical supply and demand in one. In this paper，the method of dynamic evolutionary game is used to analysis the relationship between technology supply, market demand and technological innovation. The conclusion is that only when the scale of demand reaches a certain critical value, technological innovation would be achieved.On this basis, it is concluded that there are certain critical values in all Industrial chain links by introducing the above theory to the global industry chain within the Intra-product Specialization. Especially, it is very critical for the cultivation of high-tech industries and the enhancement of elasticity of response to build an industrial chain based on our country’s development needs by using local demand scale then the ability of technology innovation will get breakthrough improvement. On the basis of theory analysis，the conclusions are verified by the statistical analysis on high technology industry data.

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