By constructing the tacit knowledge sharing mechanism model of core employees,the core employees' tacit knowledge sharing mechanism is analyzed.Then,the dynamic game model is used to analyze the incentive problem of the core employee's tacit knowledge and some conclusions are put forward as follows: organization incentive level of the core employees' tacit knowledge sharing increases with the core employees' tacit knowledge sharing cost and the amount of tacit knowledge,and decreases with the original incentive system incentive level;the core employees' tacit knowledge sharing rate decreases with the organization knowledge sharing management cost,and increases with their amount of knowledge.