Abstract: To improve the accuracy of single-phase grounding fault location in 10 kV hybrid distribution networks, this paper presents a traveling-wave fault location method that integrates wave velocity correction and reflection modeling, using a typical three-segment hybrid line as an example. The proposed method addresses key challenges in traditional single-wave-velocity models-such as large errors in multi-medium lines and inaccurate location due to complex topologies-by incorporating three critical technologies: High-frequency traveling-wave feature extraction, segment-wise wave velocity self-calibration, and hybrid-line reflection matching localization. Validated through PSCAD simulation and MATLAB algorithm analysis, the proposed approach reduces the absolute ranging error from 782 m to 245 m, lowers the relative error rate to 1.68%, and achieves a 96.7% accuracy rate in faulty section identification, thereby significantly enhancing overall reliability.