Abstract: A high performance hybrid parallel PDTD algorithm in developed by introducing the concept of two layers of parallel capacity based on local area network(LAN). In the hybrid algorithm, MPI is used in conjunction with OpenMP multithreading to achieve two level parallelism of the data, tasks at the basis of the domain decomposition FDTD method. By using this hybrid algorithm, a common hidden printed antenna for automobile is simulated. Computation results show when the grain size of the domain decomposition is on the small side, this novel hybrid parallelization scheme is an effective technique for improving the efficiency of the parallel FDTD based on LAN.