The effects of the doping elements such as La and F on the phase structure, the morphology, the activate and electrochemical properties of the spinel LiMn2O4 cathode material prepared by high temperature solid state reaction were investigated by means of the X-ray diffraction (XRD), scanning electron microscope (SEM) and battery testing system this paper. The results showed that the initial discharge capacity of the LiMn2O4-xFx sample decreased, and the cyclic stability of the specimen increased and then decreased with increasing of the content of the replacement elements Fluorine. The capacity ratio of discharge to charge and the cyclic stability of the LiMn2O4 sample were improved with the manganese and Oxygen partial replaced by La and F, respectively. The LiLayMn2-yO4-xFx sample was composed of single-phase spinel LiMn2O4 when the content of the doping elements La and F was minor, the particles of the specimen were spheroid or sphere, and the sizes of the particles were 0.5~2.5 μm. The discharge-capacity of the LiLa0.02Mn1.98O3.95F0.05 sample was 123.6 mAh/g and 114.6 mAh/g after the first and the 30th charge/discharge cycles, respectively.