The invention relates to a hydro-conversion combination method for a coal tar fraction with different boiling ranges, which comprises the following steps that: a first hydrogen fraction mainly comprising a coal tar light fraction is converted and separated at a first hydrogen device; a second hydrogen fraction mainly comprising a coal tar heavy fraction is converted and separated at a second hydrogen device; and two sets of the hydrogen devices share a circular hydrogen compressor; and the hydrogen light fraction obtained by the second hydrogen device enters a reaction part or a high fractionoil separating part of the first hydrogen device. The method can select respective proper hydrogen refining reaction conditions for the coal tar fraction with different boiling ranges, has the advantages of improving the quality of products, stabilizing the operation, reducing the energy consumption and catalyst consumption, prolong the operation cycle, simplifying the flow and the like, and is particularly suitable for large-scale classified combined hydro-conversion of medium-high temperature coal tar wide fractions.