Abstarct: In recent years, there has been a rapidly growing interest in the field of quantum plasmas, which have a broad range of applications. Today, by considering spin effects, interesting phenomena is taken into consideration. Magnetosonic waves are one of the most interesting topics in this field. The effect of spin quantum forces have been studied by several authors. In this thesis we aim to study magnetosonic waves arising from spin effect in quantum electron-ion plasmas. This thesis is baxsed on five chapters. In the first chapter an overview of the basic concepts of plasmas, parameters and definitions are considered. Quantum plasmas and its difference with classical one, overview of the models describing plasmas, distribution functions, Maxwell-Boltzman, Wigner and Wigner-Poisson, Hartry and Hartry-Fock models are mentioned in second chapter. We also derived dispersion relations and madolang method in this chapter. In third chapter, we will review on introduction of waves in quantum plasmas. Also by use of the basic equations of magneto hydrodynamics and reductive perturbation methods we extracted KdV and KdVB equations, And in fourth chapter we solved this equations, using numerical finite difference and fourth order Runge Kutta methods by given initial and boundary conditions. We also examined the effect of various parameter on the results of these equations. In the following, in chapter five we review the results of simulations. Samples codes written by Fortran and Matlab as well as proving some important relations and history of Solitons are mentioned in appendix.