In order to decrease computational time and computer memory consumed by the serial multi-resolution time-domain (MRTD) scattering model, a parallel calculation model for nonspherical aerosol scattering is proposed based on message passing interface (MPI) technique. A basic frame of the MRTD scattering model and two parallelization data communication schemes are introduced, and the parallel design for MRTD scattering model is achieved by MPI repeated non-blocking communication technique. A network parallel computation platform is established for the parallel calculation. To validate the computational accuracy of the MRTD scattering model, the simulation results of parallelized MRTD scattering model are compared with that of Mie scattering model and T Matrix method. The results show that the MRTD model can calculate the scattering parameters of nonspherical particles accurately. Parallel computational technique can improve computation efficiency notably. The computation efficiency of the parallelization design scheme that exchanges electric field and magnetic field simultaneously is higher than that of the scheme that exchanges magnetic field simply. With increasing the number of central processing unit cores, the parallel acceleration ratio of program is incresing, while the computational efficiency of single processor is slightly decreasing. With the increasing of particle size parameter, the computational efficiency of single processor is increasing as well. It also can be found that the change of complex refractive index has no notable influence on parallel computational efficiency.