The thermal entanglement characteristics in the two-qubit Heisenberg XYZ chain model under the Dzyaloshinskii-Moriya DM interaction along the z direction is studied by the calculation of the symbiotic entanglement in the presence of an external magnetic field. The research results show that as for the Heisenberg XYZ chain model in the antiferromagnetic case, with the increase of the DM interaction parameter D, the spin chain without original thermal entanglement becomes thermally entangled. Meanwhile, as the DM interaction increases, the thermal entanglement of the spin chain gradually tends to be stable and the maximum entanglement degree of the spin chain also increases. With the gradual increase of the spin coupling parameter Jz, the maximum entanglement degree of the spin chain increases and the range of thermal entanglement is extended. The increase of the anisotropy parameter γb helps to expand the range of thermal entanglement, but it has no obvious effect on the maximum entanglement degree of spin chains.