Based on the Amsterdam light scattering database, the scattering matrix of aerosol particles is investigated, and a novel modeling method for the scattering matrix element F11 is proposed. In this method, the calculated projected-surface-area size distribution is obtained by the fitting of the measured projected-surface-area size distribution with a polynomial, and then the number density distribution is derived from the calculated projected-surface-area distribution. Meanwhile, the scattering matrix element F11 of one particle at more narrow bins is calculated according to the scattering intensity with unpolarized light incidence. Furthermore, the simulated scattering matrix element F11 of the ensemble of aerosol particles is obtained by the numerical integral method. The simulated scattering matrix element F11 of the ensemble of aerosol particles can be calculated with full scattering angles and wavelengths. In addition, the direct fitting of the measured scattering matrix element F11 is conducted for comparison. Meanwhile, the spheroid model is use to research the real nonsphericity effect on the scattering matrix element F11. Simulation results indicate that fairly reasonable results of the scattering matrix element F11 for the polydispersed aerosol particles can be obtained at full scattering angles with this proposed method, which can provide a reliable and efficient approach to reproduce the scattering matrix element F11 of real aerosol particles.