The fluidized bed in this paper was studied in inclined position. The investigation was performed using a computational fluid dynamic model using SolidWorks software program, and Ansys Fluent software programs. The height of the solid particles was studied during the fluidization process with three values of inclination degree angle (20, 40, 60 degree). The model was validated using another experimental paper by Yakubov et al. (2007). The results showed that as velocity of water increased, the upgrading of solid particles inside the pipe increased, meanwhile the expansion of solid particles decreased as the inclination degree of pipe increased.