Lung adenocarcinoma (LUAD) is characterized by its aggressive nature and resistance to treatment. FAM107A is a tumor suppressor gene that has been found to possess inhibitory effects in several cancers, but its role in LUAD remains unclear. This study investigated the role of FAM107A in regulating LUAD cell growth, invasion and aerobic glycolysis and also investigated the potential underlying mechanisms. Our findings revealed that FAM107A is significantly downregulated in LUAD, and its overexpression inhibited LUAD cell growth and invasion. Furthermore, FAM107A overexpression suppressed the anaerobic phase of carbohydrate metabolism in LUAD cells. Mechanistically, FAM107A regulated the CRYAB/PI3K/AKT signaling pathway, thereby inhibiting tumor progression, and similar findings were confirmed in our in vivo mouse model. In conclusion, FAM107A can suppress LUAD progression by regulating the CRYAB/PI3K/AKT pathway and aerobic glycolysis, indicating its potential as therapeutic target for LUAD.