Two-dimensional growth of thin films is simulated using the Monte Carlo method.The effect of the interaction between particles on the morphology of the films at the preliminary stage has been investigated using Morse potential.The growth of films consists of four stages,including formation of critical nucleus,growth of clusters,formation of maze structure and appearance of continuous film.The simulated results indicate that the percentage of particles,with monomers being not included,decreases with the increase of the number of adatoms,which is in agreement with the actual conditions.