Multiferroic of strontium titanate and magnesium ferrite nanocomposites with chemical formula x SrTiO 3 + (1 − x) MgFe 2 O 4 ; x = 0, 0.6, 0.7, 0.8, 0.9 and 1.0 have been synthesized through sol gel auto-combustion pathway. The blending is based on ball milling method. The lattice parameters and crystallite size of the combination nanocomposites were constant with different ratios of SrTiO 3. FE-SEM revealed that the grain size decreased with x. The magnetization M s was carried out using vibrating sample magnetometer at room temperature while the relative permeability µ r was studied as a function of temperature at a constant frequency. Both saturation magnetization and relative permeability decreased with various increments of SrTiO 3. DC electrical resistivity and (P-E) loops measurements were investigated. The dielectric properties and DC resistivity were enhanced. Such promising results are prospective requests for sensors, high frequency applications and stage memories.