The metal material 2A12 has been comprehensively applied in helicopte r airframe,and the fungus corrosion is one of main corrosion sources affecting the metal strength mechanics performance. Test specimens are prepared a ccording to the real surface protection condition of the helicopter. Th e static and fatigue strength of 2A12 is compared under fungus corrosion and no fun gus corrosion. The results show that the fungus corrosion has no evident effect on the 2A12 static and fatigue strength. 