Abstract: The rare earths doped Ca_0.95RE_0.05MnO₃（RE = Pr,Eu,Tb） oxide bulk samples are prepared by combining Sol-gel method and ceramics fabrication method,the samples have been analyzed by X ray diffraction,scanning electron microscopy and electrical constants measuring apparatus.The results show that all the doped samples are of single phase with dense microstructure within the 5% doping content;the lattice is diminished for all doped samples;the un-doped CaMnO₃ exhibits semiconductor behavior with moderately high electrical resistivity reaching 340 mΩ·cm at 373K;the electrical resistivity for the doped samples is reduced with identical transportation mechanism,showing slightly enhanced resistivity value along with Pr,Eu and Tb;the energy needed for polaron carrier to hop is narrowed by do-ping;the praseodymium doped Ca_0.95 Pr_0.05 MnO₃ sample is found possessing lowest electrical resistivity reaching 8 mΩ·cm at 373K,which is far lower than that of the parent sample.