The C30 concrete was used as a benchmark of concrete. When the magnetic intensity is 285mT, The tests with different water flow velocity (0.6 m/s、1.2 m/s、2.1 m/s、3.0 m/s) and different dosage of basalt fiber (1 kg/m3、1.5 kg/m3、2 kg/m3、2.5kg/m3) were carried out for effects on the mechanical properties of basalt fiber concrete with magnetic water, including compressive strength, splitting strength, flexural strength and impact performance. The results show that magnetic water and basalt fiber can together significantly improve the compressive strength, splitting strength, flexural strength, impact energy and ductility. Based on the various performance indicators, the optimal basalt fiber content of 2 kg/m3 and the optimal water flow velocity of 2.1 m/s are proposed.