The invention discloses a manufacturing method for a kind of square deflection magnetism core and the materials. 1) the Fe2O3, ZnO, Mn3O4, ...MgO, and additives CuO, Bi2O3 elements are blended, prebaked, and reacted with solid phase, the compound generates the ferrite phase after being prebaked; 2) the prebaked material are grinded into pulp with particle size less than phi1.8ª–m, then the additives are added in and carries on the atomization pelleting; 3) the particles are blended and pressed, formed in the automatic presser and special model; 4) uses the flat board or bake bearing base process to carry on oriented baking. The merits of the invention are: 1) it uses cheap materials ferric oxide, with current manufacturing device and special process, it decreases the cost greatly, the key technology parameter is upgraded; 2) PF design makes the magnetic flow area and the density distributed more reasonable, it upgrades the articulation and resolution of the screen; 3)( upgrades the deflection efficiency of negative transmitting pipe of the television receiver, reduces the idle work consumption of the electron beam deflection.