The invention provides an electronic chart security watermarking technology based on a semantic feature. The technology includes: construction of a security watermarking identifier; semantic conversion of the watermarking identifier; manufacture of a semantic watermark; embedding of a digital watermark; extraction of the semantic watermark; and semantic feature image matching. According to the technology, the application of the security and reliability of a two-dimensional electronic chart is researched, data characteristics of the electronic chart and structural characteristics of files are fully considered, the stable performance of the watermarking method in terms of the watermark capacity and the robustness etc. is maintained, and goals of control of transmission security of the electronic chart and the management of the operation authority are achieved; in theory, a new principle and a new method are provided for the intersected research of the digital watermarking field, a new key technology is provided for the expanded application of digital watermarking, and the practicality of the research of digital watermarking is promoted; and in application, a new technology is provided for network safety management and reliability application of the digital chart.