Abstract: Addressing the insufficient visualization of internal structural dynamic evolution in traditional coal-rock mechanics experimental teaching, an instructional experiment scheme was designed based on a CT triaxial loading real-time scanning system.This experimental design employed raw coal specimens and integrated a micro-focus CT scanner with a triaxial experimental control platform to construct an experimental system capable of real-time acquisition of three-dimensional structural data within the specimens. By utilizing a displacement-controlled loading mode, the experiment dynamically captured stress-strain curves and CT images at various loading stages. Results demonstrated that the system successfully visualized the entire process of crack closure, initiation, propagation, and coalescence. Under triaxial loading, the quantitative proportion of fracture volume in coal increased from 0.06% initially to 3.36% before failure. Fractal theory effectively characterized the real-time evolutionary patterns of coal-rock fractures during loading. This experimental design achieves in-situ correlation observation between mechanical behaviors and fracture evolution, providing a dynamic visualization tool for rock mechanics experimental teaching, significantly enhancing the student’s in-depth understanding of coal-rock failure mechanisms.