Thermal entanglement is investigated in a two-qubit Heisenberg XYZ system with different Dzyaloshinskii-Moriya (DM) couplings. It is shown that different DM interaction parameters have different influences on the entanglement and the critical temperature. In addition, according to the relation between the real coupling coettlcients Jx and Jz, a more efficient DM control parameter can be obtained by adjusting the direction of DM interaction.