Solid-liquid suspension characteristics of stirred tank with solid holdup 9.2% was simulated by Euler-Euler two fluid model. The simulation and prediction results of two kinds of modified drag coefficient models were compared. Distribution of solid holdup and the suspension uniformity were investigated. The results showed that there were some dense deposition in the bottom of tank when the rotational speed was lower than 600 r/min. As the rotational speed increased from 400 r/min to 1100 r/min, the accumulation height decreased from 0.16 to 0, the deposition area contracted and disappeared at last. Under the action of centrifugal force, the solid particles in the circulating flow moved toward far-vortex direction. Solid holdup at the center of vortex was lower, so the suspension uniformity was drastically reduced. The two-phase flow could be divided into upper and lower circulation regions at the height of z/H=1/3. The distribution of particles was affected by the confluence of circulating flow, and the solid phase was dispersed with the flow field in the radial direction. Suspension uniformity tends to be stable at 0.5~0.7 with the increase of the height. As the rotational speed increased from 400 r/min to 1100 r/min, the value of σ in the upper circulation regions decreased by 37.2%.