Abstract: In order to study the shear behavior and reinforcement mechanism of brick wall reinforced with basalt textile reinforced concrete (BTRC), the diagonal shear tests have been carried out on BTRC reinforced walls, and the effects of single-side vs. double-side reinforcement, the number of textile layers and the strength of masonry mortar on the improvement of shear resistance have been investigated. The test results show that the BTRC and brick wall work well together, and the shear strength, stiffness and deformation capacity of brick wall are significantly improved; under the same number of textile layers, double-side reinforcement has better effect than single-side reinforcement; with the increase of the number of textile layers, the reinforcement effect of double-side is gradually improved, while the reinforcement effect of single-side changes little; for brick walls built with low strength mortar, the BTRC also transforms the failure mode of slip cracking of mortar joint into diagonal tensile failure with multi-joint cracking characteristics, and the reinforcement effect is remarkable. The mechanical characteristics of BTRC reinforced brick wall were analyzed, and the restraint reinforcement mechanism was put forward. Based on the test results and the reinforcement mechanism, the calculation method of shear capacity of brick wall reinforced with BTRC was studied.