The invention relates to a coal tar treatment system. The coal tar treatment system comprises a raw oil buffer tank, a coal tar pump, a first filter, a first heat exchanger, a dehydration tower, a first air cooler, a separator, a second heat exchanger, a coal tar charging furnace, a coal tar pressure reduction tower, a light oil blending tank, a light oil pump, a heavy oil blending tank, a heavy oil pump, a second filter, a raw material blending tank, a raw material oil pump, a make-up hydrogen compressor, a suspended-bed reactor unit, a fixed bed reactor, a pressure reduction tower, a fixed bed hot high pressure separator, a third heat exchanger, a fixed bad cold high pressure separator, a forth heat exchanger, a second air cooler, a circulating hydrogen compressor and a circulating hydrogen compressor inlet liquid separator pot. The suspended-bed reactor unit comprises a suspended-bed cracker, a hot high pressure separator, a hot low pressure separator and a cold low pressure separator. The coal tar treatment system realizes treatment on coal tar and coal tar integrated utilization product diversification and adapts to market demands.