The paper reviews the role of Plant-Growth-Promoting Rhizobacteria (PGPR) in enhancing plant growth and heavy metal detoxification in soil. PGPR, which colonize the rhizosphere and promote plant growth, can improve the bioavailability of heavy metals, increase plant uptake, and enhance phytoremediation efficiency. The mechanisms of PGPR include nitrogen fixation, phosphorus solubilization, potassium and iron solubilization, and the secretion of plant hormones. PGPR also enhance plant resistance to heavy metals through chelation, induced systemic resistance, and improved bioavailability. Future research should focus on expanding the PGPR strain bank, developing synergistic strategies, and combining PGPR with other bioremediation methods. Challenges in practical application include short survival times, low survival rates, and the need for further field studies to understand plant responses under multiple stress conditions.The paper reviews the role of Plant-Growth-Promoting Rhizobacteria (PGPR) in enhancing plant growth and heavy metal detoxification in soil. PGPR, which colonize the rhizosphere and promote plant growth, can improve the bioavailability of heavy metals, increase plant uptake, and enhance phytoremediation efficiency. The mechanisms of PGPR include nitrogen fixation, phosphorus solubilization, potassium and iron solubilization, and the secretion of plant hormones. PGPR also enhance plant resistance to heavy metals through chelation, induced systemic resistance, and improved bioavailability. Future research should focus on expanding the PGPR strain bank, developing synergistic strategies, and combining PGPR with other bioremediation methods. Challenges in practical application include short survival times, low survival rates, and the need for further field studies to understand plant responses under multiple stress conditions.