This study demonstrated that the gavage of Rothia alleviated bone loss in mice with OVX‐induced osteoporosis, improved OVX‐induced intestinal mucosal barrier injury, optimized intestinal permeability (zonula occludens protein 1 and occludin), reduced intestinal inflammation (tumor necrosis factor‐α and interleukin‐1β), and regulated imbalance of gut microbiota. Here, OCLN is linked to osteoporosis.