In order to provide the research of virtual prototype a complex 3-D virtual road environment, a 3-D FFT stochastic road model was established based on the single-point FFT model, and then the simulation result was gained by Matlab. What's more, based on the theory of triangle network, a general 3-D virtual road model with the arithmetic of nodes and elements was created. Then a specified 3-D virtual road file was imported into Adams to form the 3-D virtual road. Finally, a C-level virtual road was generated for the riding performance simulation of virtual vehicle. By comparing the simulation result with the GB/T 13441—92, the virtual vehicle's reasonable time under the ride performance requirement was obtained.