The recycling of waste glass fiber-reinforced polymer (GFRP) holds paramount importance in realizing sustainability goals. This study aims to enhance the efficacy of fiber-reinforced self-healing concrete by employing recycled GFRP (rGFRP) fibers as carriers for Microbiologically Induced Calcite Precipitation (MICP). Preparations involved the development of pretreatment of rGFRP using microbial mineralization. Examination encompassed the assessment of interactions between microorganisms and fibers, microstructural characterization of self-healing specimens, and the strength of repaired specimens. This was conducted through the quantification of CaCO3 precipitation, strength tests, scanning electron microscopy (SEM), X-ray computed topography (CT) analysis, and mercury intrusion porosimetry (MIP). The results revealed that mineralized rGFRP fibers had little impact on the flexural and compressive strength of the reinforced mortar, while increased the tensile strength by up to 34.1 %. The mineralized rGFRP fiber-reinforced mortar achieved a repair rate of 84.5 % for cracks within 0.3 mm after 28 days of water curing. Comparatively, the mineralized rGFRP fiber bacterial mortar exhibited higher water absorption than its non-mineralized counterpart. Using untreated rGFRP fibers for self-healing can reduce the porosity and water absorption of the mortar to some extent, while adding mineralized rGFRP fibers for self-healing increased the crack area repair rate and also increased the porosity of the mortar. Therefore, using untreated rGFRP fibers as a carrier for microorganisms to repair mortar may present a more favorable choice. The results of this study will contribute to further improvement in the application of fiber-reinforced self-healing concrete in the engineering field.