The white jade found in the past and the new grey-white jade, grey jade and green jade found in Liyang County, Jiangsu Province are studied by means of electron microprobe, X-ray diffraction, infrared spectrum, scanning electron microscope, etc.. The results show that the major mineral composition of Liyang tremolite jade is tremolite, not Na-tremolite as reported previously, the content of Na is normal. Based on study of the texture and structure, its major texture is almost same as that of Hetian jade, it proves that Liyang tremolite jade is also a typical tremolite jade. The genesis of the jade, the significance for exploring deposits and archaeology are also discussed in this paper.