T he relat ion of the four parameters with initial slab thickness,initial slab width,width reduction and edger roll di-ameter was obtained and a new mathematical model was accomplished as well.

• 得出表征立轧时轧件断面特征的四个参量与侧压量、立辊直径、板坯来料厚度及宽度间的关系，并建立了新的数学模型。