Cyperus rotundus L is a hyperaccumulator plant for decomposing heavy metals. High heavy metal content can inhibit its growth, thus reducing its removal efficiency. Using microorganisms in the phytoremediation process will likely improve their performance in decomposing heavy metals and increase their growth. This review aims to synthesize the current knowledge on the performance of microorganism-assisted Cyperus rotundus L. in the remediation of heavy metal-contaminated environments, highlighting this approach's key factors, mechanisms, and potential applications. The investigation used the PRISMA framework, which stands for systematic review and meta-analysis. The search was conducted using various online databases, Scopus, using a combination of keywords, including "Cyperus rotundus," "phytoremediation," "heavy metals," "plant growth-promoting rhizobacteria," and "microorganism-assisted." The process involved identifying the research question, selecting relevant studies, tabulating results, and summarizing findings. Results indicate that Cyperus rotundus L. has quite a good ability in the remediation of heavy metals such as sulfate, Cd, Pb, Mn, Cu, Fe, and Cr. Although it can grow in extreme environments, high concentrations of heavy metals can reduce its photosynthetic ability and cause death. Using microorganisms on plants can help plants increase their effectiveness in removing HM. Microorganisms play a role in plant growth promotion, heavy metal solubilization and chelation, and the elimination of metal-induced stress. Further research is needed to understand the complexities of these plant-microbe interactions fully and to optimize the application of this technology for large-scale environmental remediation.