Abstract: In order to discover a combined technique suitable to process the coal tar,an idea was provided on a fluidized bed hydrogenationpre-processing-fixed bed h ydrocracking combined technique to process the coal tar and an experiment was conducted on a STRONG fluid-ized bed hydrocracking test device. The experiment results showed that the fluidized bed hydrogenation pre-processing could highly re-duce S,N,carbon residue,metal and other contents in the coal tar raw material and could reduce the unsaturated content. The generated oilcould meet the requirements to directly in a foxed bed hydrogenation processing. After the fixed bed hydrogenation processing,t . he genera-ted oil quality was improved,a naphtha S and N content were all less than 1. 0 μg/ g and aromatic latent was 56% and could be the refinedraw material. Distillati on density of 0.856 6 g/ cm3,S content less than 50 μg/ g,hexadecane value over 53 would be a diesel harmoniouscomponents and could produce a qualified diesel. The t ail oil would be wax oil mainly,the S and N content would be 59 and 21 μg/ g indi-vidually,the carbon residue content was 0. 15% and could be hydrogenation raw material.