The invention relates to a tar separation device. The tar separation device comprises a bracket, a pyrolysis gas input pipe, tar collection units, a pyrolysis gas output pipe and a circulating water supply system, wherein the tar collection units are fixed on the bracket; at least two tar collection units are sequentially arranged from the left to right; the pyrolysis gas input pipe is connected with the tar collection unit on the leftmost side; the pyrolysis gas output pipe is connected with the tar collection unit on the rightmost side; two adjacent tar collection units are connected through a separation pipeline; and a spraying system is arranged on the upper part of the separation pipeline and connected with the circulating water supply system. The tar separation device disclosed by the invention is fast in heat dissipation, excellent in cooling effect, simple in structure and low in manufacturing cost and using cost, and the energy can be greatly saved.