The three-layer ferroelectric and ferromagnetic functional complex in perovskite-like structure is prepared through chemical reaction to synthesize three-layer perovskite-like niobate or tantalite AB2M3O10, where A=K, Na, Li, Rb, Cs and their composite ion, B=Sr, Ba, Ca, Pb and their composite ion, and M=Nb, Ta and their composite iron; acid treatment; inserting organic amine layer; precipitationprocess to form interlayer ferrite MFe3O4. The three-layer ferroelectric and ferromagnetic functional complex has alternately arranged ferroelectric layer and ferrite layer.