Researching controlled blasting technology for hazardous rock bodies in complex environments holds significant theoretical importance and provides valuable reference points for enhancing highway construction efficiency and mitigating potential risks. This study focuses on the Gulin-Jinsha highway construction project, aiming to eliminate the dangers posed by hazardous rock bodies during construction. Six scanning stations were established using 3D laser scanning technology to create a high-precision 3D Digital Terrain Model (DTM) of the hazardous rock bodies. Additionally, four object detection lines were deployed using a high-density electrical method to achieve 3D visualization of the geological features in the hazardous rock area. A fracturing test was conducted based on the high-precision 3D model. The designed depth of the shell hole was 70% of the height of the hazardous rock body, with fracturing pipes connected in series and each pipe carrying a total charge of 720 g. The results demonstrated that the constructed high-precision 3D model accurately reflects the morphological characteristics of the hazardous rock body, providing reliable information for the blasting design. The fracturing pipes showed effective fracturing performance, facilitating the removal of the hazardous rock body during subsequent stages. This method offers a viable reference for similar projects, showcasing the potential for efficient and safe removal of hazardous rock bodies in complex environments.