Spinel LiMn2O4 was synthesized by densified chemical manganese dioxide and electrolytic manganese dioxide. The phase identification, surface morphology and electrochemical properties of the synthesized powders were characterized with x-ray diffraction, scanning electron microscopy, cyclic voltammetry and galvanostatic charge-discharge experiments. The LiMn2O4 powders prepared by densified chemical manganese dioxide and electrolytic MnO2 shows similar X-ray diffraction patterns. When discharged at the rates of 0.2C, 0.5C, 1C, 2C and 3C, the capacity of LiMn2O4 powders prepared by densified chemical manganese dioxide is 108.5 mAh/g, 104.7mAh/g, 97.3mAh/g, 86.5 mAh/g and 70.7 mAh/g，respectively, while the one prepared by electrolytic MnO2 is 106.1 mAh/g, 103.4mAh/g, 99.1mAh/g, 89.2mAh/g and 75.5mAh/g. There are no obvious difference in the cycling behavior between the LiMn2O4 prepared by densified chemical manganese dioxide and electrolytic MnO2. The densified chemical manganese dioxide can produce LiMn2O4 with good electrochemical performance as the one prepared by electrolytic MnO2.