High nickel chrome molybdenum compound ductile iron roller was produced by centrifugal casting. Crack defects often appeared in the roll barrel, which became the important influencing factors to restrain the improvement of product quality. Through analyzing the characteristics and origination of crack in the roll barrel, the countermeasures were put forward. Through the countermeasures, crack in the roll barrel is effectively controled and decreased, increasing the qualification rate of the roller.