Abstract: The network effect of consumer decision-making make the consumer decision-making embedded in the network limited by some specific factors, and the network structure will affect the decision-making behavior of consumers and the state of consumer macrostructure. The new analysis method, which called consumer decision-making networks, is to abstract and topology consumer decision-making network with graph, and then studied the differences in the nature of the network topology and their impacts on consumer decision-making. It provides a new framework and model to describe and handling complex consumer decision-making for study the consumer decision-making network effect systematically. In this paper, some intensive research on the relationship between consumers based on a preliminary study is done. The relationship between consumers is the key factor and foundation to the formation of consumer decision making network, and only understand how the consumers relate, then further study about the network's structural characteristics and their impacts can be carried on. Further to describe the relationship of consumer, the consumer decision-making individual network is proposed to studied the connotation and structure indicators of it. Finally, an example of the influence of network size of CDMIN on consumer decision-making and the market is simulated.A theoretical basis and simulation verification method for the follow-up study of consumer decision-making total network, as well as the consumer decision-making network effect are provided in this study.

Key words: consumer decision-making network, consumer decision-making individual network, decision-making relationship