The invention discloses an oil pipeline auxiliary heating device which comprises a pipeline, a heat preservation layer wrapping the pipeline and a support frame at one end of the pipeline. A triangular support is arranged under the pipeline and fixed to the pipeline and a foundation. The triangular support is provided with a tail seat box for solar vacuum pipes, and a plurality of blind pipes with downward openings are welded to the bottom of the pipeline. A plurality of copper heat pipes are further arranged under the pipeline, condensation sections of the copper heat pipes are inserted into the corresponding blind pipes, and evaporation sections of the copper heat pipes are wrapped with aluminum wings and inserted into the solar vacuum pipes. The open ends of the solar vacuum pipes are inserted into the heat preservation layer by 3-5 cm, plugs are arranged on orifices of the solar vacuum pipes, and the tails of the solar vacuum pipes are inserted into the tail seat box. The oil pipeline auxiliary heating device overcomes heat loss of the oil pipeline, and is reliable in performance and environmentally friendly.