The 7050 aluminium alloys are widely used in the aviation and aerospace for their higher strength,fracture toughness property and anti-fatigue performance. The effects of single-stage aging on alloy tissue and performance were studied by the hardness test,corrosion test and transmissive electron microscopic analysis (TEM) of 7050 aluminum alloys. The experimental results show that the 7050 aluminum alloys have a strong aging hardening effect. When the single-stage aging temperature rises from 120℃to 160℃,the speed of alloy aging hardening accelerates significantly,and the time required for alloys to enter the peak aging state is significantly shortened,but the hardness of the peak point of the alloys reduces. After aging treatment,the alloy precipitates abundant of fine η' phase dispersing in the matrix. A coarse equilibrium phase is precipitated at the grain boundary of the alloy with MgZn2 as the component and PFZ appears. With increasing aging temperature,the precipitation phase on the grain boundary is continuous and coarse,PFZ is widened and the intergranular corrosion resistance of the alloy continues to decrease. For exfoliation corrosion,the degree of alloy corrosion is related not only to the structure of the grain boundary but also to the number of it. As the temperature rises,the grain size of the alloy increases rapidly,and the number of the grain boundary reduces significantly,the interaction of which results in the improvement of the alloy's anti-corrosion property.