The bifurcation and chaotic behavior of a parallel platetype structure with nonlinear elastic support in axial flow were investigated. By assuming that all the plates have the same deflections at any instant, and considering the effect of cubic elastic spring on the platetype beam, the partial differential equation of the system was transformed to the firstorderstate equation. Based on this, numerical simulations show that the parallel platetype structure has rich nonlinear dynamics. The complex bifurcations and chaotic motions were detected by analyzing several key system parameters, and the route to chaos was shown to be via classical perioddoubling bifurcations.