We report on micromagnetic simulation results of the dynamical behaviors of magnetic vortex driven by spin polarized currents with three-point-contact geometry. The influence of the magnitudes

directions

and inter-distances of the spin polarized currents on the dynamical behaviors of magnetic vortex was studied. The results indicate that all the magnetic vortex configurations undergo similar gyrotropic motion and polarity switching with the increase of current density. Compared with the symmetrical contact point position

the vortex core can be excited more easily with the asymmetrical contact point position at the current direction of (1

1

1)

which expands the current range of similar gyrotropic motion and shortens the time to the transient state of polarity switching. This result makes magnetic vortex more advantageous in the application of spin-torque nano-oscillator and magnetic storage. At the current direction of (1

1

-1) the asymmetrical contact point position has little influence on the dynamical behaviors of magnetic vortex. It is the asymmetrical current direction that plays an important role in the dynamical behaviors of magnetic vortex.