In order to study the influence of Fe content on the microstructure,properties and electrochemical corrosion properties of 2219 aluminum alloy and its welded joints,mechanical tensile test,welding test, metallographic and scanning electron microscope were used to conduct experimental research and analysis on 2219 aluminum alloy forgings with different Fe contents from 0.15%(w) to 0.01%(w).The results show that there are Al₇Cu₂(Fe,Mn) phases in 2219 aluminum alloy which are transformed into granular and fibrous Al₇Cu₂(Fe,Mn) phase after thermal deformation processing.With the decrease of Fe content from 0.15%(w) to 0.01%(w),the Al₇Cu₂(Fe,Mn) phase after solid solution aging of the alloy is significantly reduced, and the strength and plasticity of the forging are significantly increased.The fracture of the alloy welded joint is transformed from brittle fracture to ductile fracture with small dimple size.The strength and plasticity are significantly increased,and elongation is increased to nearly 1.4 times especially.The corrosion current of the alloy decreases gradually and the linear polarization resistance per unit area increases,so the corrosion resistance of alloy welded joints is improved significantly.