Magnetoelectric (ME) coupling effects in multiferroic materials have attracted much attention in recent times because of the intriguing science underpinning this phenomena and being currently intense interest in the implementation of this coupling in an electronic devices. A new multiferroic system comprising of BaTiO3 (BTO) and BaFe12O19 (BHF) has been synthesized as a bulk nanocomposite system in variation of weight fraction of BTO: BHF =1:1, 1:2 and 1:3 and the second sinter temperature was 925°C for 5, 10 and 15 hours. The presence of both phases were confirmed by X-Ray Diffraction (XRD) studies and MPS Magnet - Physik EP3 - Permagraph L was used to characterize magnetic properties.The morphology and particle size of nanocomposite was characterized by using Transmission Electron Microscope (TEM). No residual phases were identified in the XRD analysis for all parameters confirming the formation of a BTO-BHF composite system. The TEM images show that all samples have particle in nanosize.For weight fraction of BHF until 2 parts there is an increase of intrinsic coersive and magnetization saturation value. If the weight fraction of BHF exceeds from 2 parts, the coersivity and saturation values decrease. Meanwhile in compound of polyvinyl acetate (PVA) and BHF as a compare material, the magnetic properties increase with increasing the content of BHF until 3 parts. From the above results, it presumes that the nanocomposites with weight fraction of BTO: BHF = 1:3 for all time of sintering have ME coupling interaction showing a multiferroic nature. To give evidence of this phenomena, it needs a measurement of ME coupling coefficients for all parameters.