Magnetic frustration can induce interesting magnetic phases including skyrmion state in centrosymmetric materials. By means of Monte Carlo simulations, we theoretically study the frustrated J1-J2classical Heisenberg model on the triangular lattice. Both h-J2 and h-T phase diagrams show rich magnetic phases, and skyrmion state can be stabilized by J2. These results can be qualitatively explained by energy competitions, and indicate that skyrmion can be driven by the competition of short-range interactions in absence of DM interaction. This may help us to design and apply the skyrmion devices more easily in the future.