Knowledge transfer can provide an organization with comparative competitive edge, and organizational learning may enhance its adaptive ability to environments. Their mutual efforts support organizational sustainable competitive advantages, This paper reviews the literatures of overlapping knowledge, knowledge transfer, and learning capacity, and analyzes the characteristic relationships between overlapping knowledge and knowledge transfer, and organization learning. The model of these relationships is made up of knowledge ecological perspective, and further we demonstrate the proposition that overlapping knowledge is an adjustor of the optimization of the efficiency of knowledge transfer and learning ability. Lastly, the management implications are concluded