The release behavior of hydrocarbon components of superfine pulverized coal pyrolyzed under reburning conditions was investigated by means of pipe furnace and gas chromatography.The test results showed that the main component of pyrolysis gas was CH4，and other components

such as C2H4

C2H6

C3H6

C3H8 and C4H10were relatively less.The amount of released hydrocarbon components of Longkou lignite is the greatest，that of Shenfu bituminous coal was the second，and that of Jincheng anthracite was obviously less than that of the above two.The release amount of hydrocarbon components increased with the decrease of particle size.But as the particle size decreased to a critical value，the release amount of hydrocarbon components no longer increased obviously.With Longkou lignite and Shenfu bituminous coal as reburning fuels，the NOx reduction efficiency could be enhanced because the amount of released hydrocarbon components in the volatile matter increased.