To explore the protective effects of water extracts from different Ganoderma lucidum (G. lucidum) mycelium on ethanol-induced hepatocyte injury in LO2 cells. The effects of water extracts obtained from different G. lucidum mycelium against ethanol-induced damage to LO2 cells were examined in this research. Cell survival rate, alanine aminotransferase (ALT), aspartate aminotransferase (AST), reactive oxygen species (ROS), superoxide dismutase (SOD), glutathione (GSH) and malondialdehyde (MDA) levels were measured in a liver injury model employing ethanol-induced LO2 cells, to assess the preventive effects of G. lucidum mycelium water extracts against ethanol-induced damage. The results showed that water extracts from the mycelium of all seven strains exhibited varying degrees of protective effects. Among them, the water extract from strains G0119 and G0154 had the best protective effect. Compared with the model group, the intervention of water extracts significantly increased LO2 cell survival (P