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以三种不同的煤焦油沥青为原料，分别与吡啶硼烷反应制备了硼取代中间相沥青。比较了它们的软化点、残炭值、四氢呋喃不溶物（THFI）以及中间相的偏光显微结构。发现煤焦油沥青不同所得结果有显著差别：较高软化点的沥青与吡啶硼烷的反应活性较强，而相同软化点的净化煤焦油沥青与吡啶硼烷具有更强的反应性，所得中间相沥青的软化点、残炭值及四氢呋喃不溶物的含量较高，其偏光显微结构也证实了这一点。“,”Boron-substituted mesophase pitches were synthesized by co-pyrolysis of different coal tar pitches with pyridine-borane complex.The softing points, coke yields, solubility in tetrahydrofurane (THF) and polarized micrographs were compared. It is found that the results are different. The coal tar pitch with high soffening point after purification had higher reactivity with pyridine-borane, which was proved by the soffening point, coke yield solubitily in THF and polarized microstructure of obtained pitch.