The nonlinearity of dust-acoustic waves in a dusty plasma whose constituents are negatively charged dust, ions and electrons following Boltzmann distribution, is investigated by Sagdeev potential method. Existence of both subsonic and supersonic compressive solitons of interesting characters is established in this magnetized plasma model based on dust charge Zd (involved in f) and temperature ratio. The condition of the existence of solitons is ݇ ௭ ଶ ‫ܯ‬ ଶ < 1 + (1 − ݂)ߙ ݂ < 1 ‫ܯ‬ ଶ The amplitudes and depths of the potentials of subsonic and supersonic compressive solitons increase with the increase of dust charge Zd, but decrease with the increase of temperature ratio .

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