This paper has taken the high temperature solid state method to prepare double perovskite type of resistance materials Ca_2-xLaxFeMoO_6. After the XRD phase analysis, it has been proved that the products all belong to monoclinic system and the space groups is P21/n. The magnetic property test result proves that the intensity of indoor temperature saturation magnetization of the 1T magnetic field respectively are 11.817、9.805、4.766 and 2.111emu/g, besides, the magnetic property testing result proves that the...