Abstract: The aim of the present work is to study the effect of different corrosion inhibitors on the corrosion fatigue life of aluminum alloy lap joints. Firstly, pre-corrosion tests were carried out for a period on the 7050 aluminum alloy lap joints covered with TFHS-10 or TSN-7 corrosion inhibitor as well as the joints without corrosion inhibitor. Then, fatigue testing and morphology observation were carried out to obtain the fatigue life and corrosion morphology of the lap joints. Finally, the effect of the presence or absence of corrosion inhibitor and different types of corrosion inhibitors on the corrosion fatigue life of the lap joints were compared and analyzed. The results show that after the same corrosion time, the corrosion degree of bolt hole sides and joint surfaces of the joints without corrosion inhibitor is more serious than that of the joints with corrosion inhibitor. Compared with uncoated joints, the fatigue life of the lap joints coated with TFHS-10 and TSN-7 corrosion inhibitor increases by 77.9% and 49.2% respectively. Corrosion caused corrosion pits on the surface of the lap joints, reduced the average thickness of the plates, and formed local stress concentration points, thereby increasing local stress. As a result, fatigue cracks were more likely to form, resulting in a shortened fatigue life.