为促进健康长江评价工作开展，依据长江流域自然地理及河流水系特点，在尊重已有习俗和规范基础上，从点、线、面3种口径对健康长江评价的区划方法和评价尺度进行了探讨。根据单指标评价和综合评价的不同需要，提出了不同评价口径和尺度之间指标值的转换计算方法，可以为健康长江评价提供技术参考。

The regionalization and rating scale of the health assessment for the Yangtze River are expounded from the criteria of point, line, and area. The study is made according to the characteristics of the physical geography and river system in the Yangtze River basin based on conventions and existing norms. In light of the assessment by first grade indicators and multidisciplinary indicators, the conversion of index values among different criteria and scales and the calculation method are also proposed to provide technical reference for the health assessment.