Using nitrate precursors, a novel microwave-assisted progress for the preparation of nanocrystalline pure YFeO3 phase has been developed. Synthesis of perovskite YFeO3 has been achieved with carbon to enhance microwave absorption, polyvinyl alcohol as inhibitor and urea as homogeneous precipitator. The precursor led to formation of phase pure YFeO3 nanocrystalline (52-64 nm) after calcination. The obtained YFeO3 samples were characterized by XRD analysis, N2 adsorption, FT-IR, SEM, TEM, UV-vis/DRS. The synthesis is a fast, simple and inexpensive process and such nanosized YFeO3 has a potential application in photocatalysis under visible light irradiation due to its structure of perovskite-type and photo-absorption property.