Abstract: Chlorine disinfectants were widely used during the coronavirus disease (COVID-19). Water quality and human health might be affected by chlorine residues. Residual chlorine and its guideline value was not set in the quality standards of drinking water sources in China. The lack of result evaluation and standards of field rapid analysis methods were also problems to be solved. In order to provide a reference for monitoring and evaluation of residual chlorine in water in public health events, the domestic and international guideline values, laboratory analysis standards and field rapid analysis methods for residual chlorine in drinking water were summarized. The results showed that: (1) The guideline values of residual chlorine in the distribution systems (0.1-2.0 mg/L) and at the point of delivery (0.1-1.8 mg/L), and the maximum concentration of residual chlorine in drinking water (4-5 mg/L) were set by other countries, regions and WHO. (2) Colorimetric and titrimetric methods were considered as standards or recommended analytical methods for laboratories because of their rapid response, stability, high accuracy and high precision. High performance liquid chromatography (HPLC) could also be applied for trace analysis of residual chlorine due to its low detection limit and high sensitivity. (3) Most field rapid analysis and on-line monitoring methods were colorimetric and electrochemical methods, but there was no uniform standard method. The research showed that the maximum concentration of residual chlorine in drinking water in foreign countries, regions or organizations was 5 mg/L. The recommended minimum concentrations for residual chlorine to point of delivery were 0.5 mg/L in high-risk circumstances. It was suggested to carry out the standardization research on the field monitoring methods of water.