In the process of oilfield development and production process, scale inhibitors are widely used to mitigate scaling issues in reservoirs, wellbores, and pipelines. However, the mechanisms of scale inhibitors against scaling ions such as Ca2? and Mg2? in high-salinity fluids remain unclear. Additionally, the coupling effects among field-applied scale inhibitors, biocides, and corrosion inhibitors are still unexplored, which hinders the efficient and scientific application of chemical agents. This study innovatively establishes a dynamic laser turbidity testing platform using a non-invasive device to accurately simulate rapid batch testing of scale inhibitors under oxygen-free, high-temperature, and flowing conditions in reservoirs. By comprehensively considering factors such as complex ions, scale inhibitors, and their interactions, the study develops predictive models for dynamic scaling and scale inhibition of MgxCa1-xCO3 and BaxSr1-xSO4 in complex ion environments. It investigates the interactions between additives and scale inhibitors, clarifying the synergistic and antagonistic effects of demulsifiers, corrosion inhibitors, and biocides on scale inhibitors. These findings aim to provide guidance for precise selection of high-efficiency synergistic chemical systems and cost-effective improvements in chemical protection technologies.