AbstractEnvironmental protection and recycling of resources are issues of international concern today, recycled concrete, as a green building material, can promote the healthy development of the construction industry. This study aims to assess the mechanical enhancements in recycled concrete when reinforcing with varying steel fiber volumes, evaluating its potential for broader structural applications. By reinforcing the recycled coarse aggregate, the addition of steel fibers, and the study of improved mechanical properties of the recycled concrete improved scale. Designing a comparative experiment to analyze mechanical properties of three different coarse aggregate steel fiber-reinforced recycled concretes, steel fiber volume rates were 0%, 1%, 2%, and 3%, and strength class was C30, a total of 144 pieces of 100mm x 100mm x 100mm cubic specimens. Analyzing uniaxial compression, split tension, shear, and biaxial compression-shear forces, the study of damage mechanisms and stress-strain curve p.....