Employing the standard k-e turbulence model and sliding mesh technique, Fluent software was used to simulate the mixing flow peculiarity of the gasoline blending in the gasoline tank with installing side entering agitators. Simulation results show that high speed region is located in the vicinity of the Z=0.126 m plane paddle, where the speed can reach to 10.02 m/s. After continuous attenuation, the speed can reach to 0.35 m/s near the wall eventually, which meets the gasoline blending requirements according to the national standards. The stirring axis has a downward inclination with the horizontal plane in order to optimize the flow field in the middle and lower part of the tank further.