The transfer of knowledge has become the key foundation to build competitive advantage for many organizations. Based on related literature review, this paper reveals the general process and inherent mechanism of technological knowledge transfer from the dimension of R&D unit. Then the framework of transfer ways within R&D unit is designed through using the model of Nonaka and Takeuchi to explain the specific approaches and means of technological knowledge transfer. Finally some ideas are provided for improvement of Chinese enterprises’ independent innovation from the perspective of internal knowledge transfer performance of R&D unit.