Using the modified analytical embedded atom method (MAEAM), the lattice dynamical properties of B2 FeAl alloy, including the lattice constant, formation heat, elastic constants, phonon dispersion curves, density of states, specific heat, Debye temperature and linear expansion coefficient, have been calculated. The results are compared with the experimental data, as well as with the existing theoretical calculations. The present calculated results are in good agreement with the experimental data and those calculated by others.