The invention relates to the technical field of hydraulic structure visualization, in particular to accurate locating and a visual treatment method of dam panel defects. The visual treatment method includes the steps that the defects are marked on the dam surface of a dam, and the characteristic of the defects is explained so as to convenient to subsequent digitization work; an RTK technology is adopted to digitize the marked detects; geodetic coordinates collected by the RTK are converted to rectangular coordinates capable of displaying visually, and that is, three-dimensional data are converted to two-dimensional data; and RTK data are processed, an graph forming function of AutoCAD software is used, the processed data are imported into the AutoCAD software, and characteristic legend ofcracks is increased. According to accurate locating and the visual treatment method of the dam panel defects, the apparent defects of hydraulic structures of the dam and the like can be located accurately, accurate locations of the apparent defects are visualization, the breakthrough provides reliable data for establishing a monitoring database and guaranteeing long-term safety of the hydraulic structures of the dam and the like and lays the foundation for subsequent three-dimensional visualization work of the hydraulic structures of the dam and the like.