Abstract: Given that different expert allocation strategies in team-based organizations tend to result in varied knowledge diffusion performances, this study takes the perspective of structural dimensionality. It constructs a knowledge diffusion model of team-based organizations based on the complex network theory and explores the influences of different expert allocation strategies on knowledge diffusion performances by applying the simulation techniques. The major findings for this study are as follows: team-based organizations with the same network density and size exhibit a better knowledge diffusion performance than those traditional organizations. Experts exhibit the best knowledge diffusion performance in the even distribution strategies among teams. The disseminative capacity of the same advancement range turns out a better knowledge diffusion performance than the absorptive capacity. Thus, it could be concluded that confined by the equivalent resources, an organization should give priority to enhancing its members' disseminative capacity.