The invention discloses a method for improving the cold forming performance of a GH4090 cold-rolled band. The cold forming performance of the GH4090 cold-rolled band is improved by the three stages of softening treatment before cold forming, cold bending forming, and aging treatment after the cold forming. Before the cold forming of a GH4090 component, a new heat treatment system is adopted and a once softening treatment process is added to reduce the hardness of a material, so that the cold forming is performed smoothly. The method has the advantages that firstly, the temperature in the softening treatment method is lower than common softening treatment (solid solution annealing temperature), the oxidation deformation degree of the component is low, and moreover, crystal grains of the GH4090 material cannot grow; secondly, by adopting the new process method, the hardness of the material of the component is reduced properly on the basis that guaranteeing the mechanical performance of the material is guaranteed, so that the material has proper hardness (HV289-399/HRC30-40), the hardness is reduced, and meanwhile, the plasticity of the material is improved, and the cold forming performance of the material is improved.