The effect of pre deformation and ageing on mechanical properties and microstructure of 7N01 alloy was investigated by means of process optimization, mechanical property measurement and microstructure characterization. The results show that, compared with single deformation and aging treatment, a suitable combination of pre deformation and thermal aging can significantly improve the mechanical properties of the material. In this study, sample processed with a 10% pre deformation and followed by 120 ℃ aging treatment had the best mechanical property with 430 MPa yield stress and 470 MPa tensile strength, respectively. Meanwhile, the elongation still maintained as 14%. The dislocation introduced during pre deformation played a key role on the types, size and distribution of precipitates in the subsequent aging treatment, which affected the final mechanical properties of the alloys.