The influence factors of product distribution of coal pyrolysis were summarized. It would indicate that properties of coal, pyrolysis conditions, pretreatment, catalyst, co-pyrolysis have a major impact on coal pyrolysis. By controlling these factors, it’s could increase the efficient of coal conversion and regulate the products distribution from coal pyrolysis . Development of efficient hydrogenation catalyst and co-pyrolysis with other hydrogen-rich material are important measure of improvement coal pyrolysis tar yield and regulation of product distribution.