The invention belongs to the technical field of concrete numerical value simulation study, and relates to a concrete aggregate numerical value model rebuilding method. A single aggregate test specimenor a group aggregate test specimen is grinded and shot to obtain a continuous profile image of the aggregate, based on the continuous profile image, an aggregate model is built, and according to theaggregate model, an aggregate model database is built. Multiple aggregate models can be built simultaneously through the group aggregate test specimen, the problem that implementation is inconvenientsince CT scanning equipment is expensive can be solved, based on real concrete aggregate particles, three-dimensional rebuilding is conducted, real aggregate appearance characteristics are simulated to the greatest extent, the built aggregate model is stored in the form of grids, conditions are created for building the real aggregate model database, the aggregate model can be subjected to format mutual switch with CAD software or FEA finite element simulation software, and numerical value simulation study of concrete mechanical performance is facilitated; the image obtaining mode is simple andquick, the obtained image is small in sequence interlayer spacing, high in alignment degree and complete in information amount.