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The hazards of residual triazine herbicides in the environment to aquatic organisms and humans are introduced, and the principle, development history and current research status of triazine herbicide detection by algal chlorophyll fluorescence technology are described. The basic reviews the research progress made in the rapid detection of trace triazine herbicides and the analysis of their biotoxicity using algal chlorophyll fluorescence technology. Furthermore, it analyzes the ongoing efforts to improve the detection sensitivity of this technology. In conclusion, the advantages and limitations of algal chlorophyll fluorescence technology in practical applications are summarized, and the future development direction of this technology is proposed. To enhance its potential, the future focus should involve optimizing existing detection technology, identifying more sensitive chlorophyll fluorescence parameters, or developing new algal biosensors with lower detection limits and higher sensitivity based on the response characteristics of algal fluorescence to herbicides. Moreover, the aim should be to apply this technology for in situ, online, and continuous monitoring of the water environment, thereby enabling better regulation, monitoring, and risk assessment of triazine herbicides in water. [ABSTRACT FROM AUTHOR]