The invention discloses low-magnetism concrete which is prepared from 200 to 450 kg/m<3> of low-magnetism cement, 0 to 90 kg/m<3> of a mineral admixture, 600 to 900 kg/m<3> of sand, 1,000 to 1,400 kg/m<3> of gravels, 4 to 10 kg/m<3> of a polycarboxylic acid water reducing agent and 130 to 180 kg/m<3> of water, wherein the magnetic field intensity of the magnetized low-magnetism cement is less than 20 nT, and the magnetic field intensity of the magnetized low-magnetism concrete is less than 60 nT. The low-magnetism concrete provided by the invention fills the industrial blank, and provides the low-magnetism concrete; by reselection of the raw materials and specific design of proportions, the magnetism of the magnetized low-magnetism concrete can be within 60 nT; the low-magnetism concrete can be widely applied to large-volume engineering construction, such as ocean engineering, national defense construction and precision engineering, and has an important significance.