The transport properties were studied for rare earth manganese oxide La_(0.67)Ca_(0.33)Mn_(1-x)Fe_xO_3 (x=0～0.3) systems. It is found that with increasing Fe~(3+)-doping content x, the resistance increases and the insulator-metal transition temperature (T_(IM)) shifts to lower temperature. If the doping content is small, the transport properties manifest metallic characteristics in the temperature range of TT_(IM). Such a behavior may be attributed to the Fe~(3+)-doping and possible Mn ions scattering to electrons. The Fe~(3+) doping may lead to the formation of Fe~(3+)-O~(2-)-Mn~(4+) channels, which could terminate the double exchange Mn~(3+)-O~(2-)-Mn~(4+) channels. The antiferromagnetic clusters of Fe ions may induce the Mn ions to scetter to the electrons. The transport properties were studied for rare earth manganese oxide La_ (0.67) Ca_ (0.33) Mn_ (1-x) Fe_xO_3 (x = 0 ~ 0.3) systems. It is found that with increasing Fe ~ (3 +) - doping content x , the resistance increases and the insulator-metal transition temperature (T_ (IM)) shifts to lower temperature. If the doping content is small, the transport properties manifest metallic characteristics in the temperature range of T T_ (IM). Such a behavior may be distributed to the Fe ~ (3 +) - doping and possible Mn ions scattering to electrons. lead to the formation of Fe ~ (3 +) - O ~ (2 -) - Mn ~ (4+) channels, which could terminate the double exchange Mn ~ (3 + 4+) channels. The antiferromagnetic clusters of Fe ions may induce the Mn ions to scetter to the electrons.