A study conducted on the magnetic properties of composite material made of two materials i.e. BaFe12O19 (Barium Hexaferrite) and SrTiO3 (Strontium Titanate) using mechanical Alloy method. Composition proportion refers to the equation (BaFe12O 19)1-X(SrTiO3)X X=20%, 50%,and 80% wt. Each BaFe 12O19 material produced from base material of BaCO 3 and Fe2O3 powder, SrTiO3 produced from mixture of SrCO3 and TiO2 powder. Each material are milled for 80 hours, of which on interval 20 hours, powder is extracted for particle measurement only for X=20 % wt composition, the X=50% wt and 80 % wt compositions are not measured. Next the material was made into bulk with 70 kN pressure die, and sintered at temperature of 1100°C for 4 hours, characterized with XRD, then magnetic character is measured with fermagraph.