In this paper we deal with the preparation of Sm_(1-x)Ca_xFeO_3(x = 0-0.3) ceramics by the solid stat reaction and study the influences of Ca~(2+) doping on the dielectric, ferromagnetic properties and magnetic phase transition of SmFeO_3. The crystalline structures of the Sm_(1-x)Ca_xFeO_3(x = 0-0.3) samples are characterized by X-ray diffraction.The dielectric property is measured by a precisive impedance analyzer(HP4294 A) in a frequency range from 40 to110 MHz. The microstructures of Sm_(1-x)Ca_xFeO_3 a...