We investigated the kinematic rupture along a complicated fault system during the 2008 Wenchuan earthquake. Assuming a slip distribution estimated using Interferometric Synthetic Aperture Radar (InSAR) data by Hao et al. (2009), we tried to fit two near‐fault station seismograms, one of which was located between two subparallel dipping faults. Forward numerical simulation results suggest that two subparallel dipping faults ruptured coseismically during the 2008 Wenchuan earthquake. This result provides a constraint on the dynamic fault interaction of reverse‐fault earthquake, which is different from the branched strike‐slip faults where the free surface does not affect the rupture branching.