Abstract: The physical properties analysis results show that the content of paraffin in the coal chemical naphtha is high (>90 wt%), the content of naphthenes and aromatics is less, while the content of latent aromatic is low. By comparing the pyrolysis gas/liquid product yield of coal chemical naphtha at 860-900 ℃, it shows that the coal chemical naphtha is a high quality pyrolysis raw material, which is suitable for pyrolysis at high temperature (900 ℃). With the increase of pyrolysis temperature, the pyrolysis liquid phase product yield decreases and the content of aromatics in the pyrolysis liquid phase product increases. The pyrolysis liquid phase product is based on C₅-205 ℃ component as the main component (>75 wt%), of which benzene, toluene, xylene together account for more than 70 wt%. Compared with the refinery head oil and naphtha, the price of coal chemical naphtha is low, the output will increase year by year, the yield of pyrolysis ethylene and triene is high and the yield of pyrolysis liquid phase product is slightly lower. Therefore it will be a new path to solve the shortage of ethylene raw materials and enhance the benefits of deep processing of coal resources by taking the coal chemical naphtha to be a reasonable supplement of ethylene enterprise raw material resources.