The thermal entanglement of spin-1 XXZ-type Heisenberg chains in the presence of a uniform magnetic field along z axes is investigated by means of negativity theory. The existence of magnetic fields can obviously reduce the entanglement,and it is found that the critical temperature depends on the anisotropic parameter Δ but not on the uniform magnetic field. The results show that the increase of the qutrit results in the decrease of the critical temperature. In addition,the critical temperature is independent of the lengthof the chain.