Abstract: In order to improve the feasibility of knowledge innovation in the supply chain,firstly,this paper narrated the meanings and characteristics of knowledge innovation in the supply chain.Then according to different levels of supplier involvement,four level of supplier involvement in knowledge innovation were constructed.On basis of this,the first level of cooperation knowledge innovation,i.e.the supplier's commitment to price,has important meaning.Then based on supply chain model of one-to-one manufacturer and supplier,the profit function of manufacturer and supplier was constituted under two kinds of situadon,through solving the function,economic decision-making condition for the supplier to commit price was induced.

Key words: knowledge innovation, supplier involvement, supplier coordination, price commitment, economic decision-making