The structure of amorphous MoS3 as the cathode materials in lithium batteries was studied by using X-ray diffraction method and X-ray photoelectron spectroscopy. The results revealed that the structure of amorphous MoS3 is built by homogeneously eandomly stacking of the MoS2 basic unit S-Mo-S sand wich layvs and the amorphous sulphus chains Sn.