Abstract: Maraging steel has ultra-high strength and fine comprehensive characteristics.However,a large number of banded structure was found in the forging process,such structure has seriously affected the properties of the material,such as anisotropy,lower plasticity,impact toughness and reduction of area.This paper focuses on the internal factors of the banded structure,and explores the methods of elimination of the band structure through heat treatment process,experimental study shows that the alloy via 1050℃×2h +820℃×1h heat treatment.,the banded structure was basically fragmented or eliminated,organization and composition became fine and uniform,the mechanical properties of materials were effectively improved.