A multinational corporation is viewed as a network of its operating and accumulating knowledge according to the knowledge-based view of firm. Effective sharing and transferring of knowledge within the internal network of the multinational corporation is one of necessary preconditions of expanding its competitive advantages. In special social political, economic and cultural context of host countries, the nodes of the multinational corporation's internal network accumulate rich country-specific expertise. So the cross-border transfer of knowledge must be affected by a series of factors. These factors are analyzed in this paper and a conceptual model is constructed.