Abstract: Due to the high temperature treatment，fly ash has the characteristics of multipore，rough surface，high hydrophobic etc.and because of which the pellets has poor properties by conventional methods of pelletization.In order to improve the properties of pellets，damp milling methods is applied for the pretreatment of fly ash.The results indicated that，compared with non damp milling operations，while damp milling for 9 min，drop strength and comprehensive strength of green pellets increased from 9.2 times，20.09 N/P to 30.5 times，30.78 N/P，drop strength and comprehensive strength of dry pellets increased from 0.7 times，52.44 N/P to 2.1 times，86.42 N/P，pulverization rate decreased from 18.42% to 5.23%.After damp milling，there are more microfine particles and larger specific surface in fly ash，which decrease the mergers and acquisitions possibility of mother balls.The mother balls tend to absorb the microgranular powder and gradually grown up，making the pellets possess high quality.

Key words: Mixture of fly ash, Damp milling, Pellets