The lamproites in Zhenyuan area, Guizhou, are structurally confined to the deep faults in the platform or the platformal fold belts. They are the hypabysal intrusions and occured as a dike or a sheet ranging from several centimetres to several metres thick and tens to thousand metres long in the Shenchong, Baifen and Sinantang complexes. The rocks, as a whole, display distinct lamprophyric textures and massive structures with porphyritic crystals of Ti-phlogopite, diopside and pseudo-olivine. The matrix minerals, except that mentioned above, are consisted of sanidine, leucite, amphibole, apatite, zircon, rutile as well as a few pyrope and chromite, The compositions of phlogo- pite, chromite and pyrope are similar to that of lamproites from West Australia, which in Mycher, J. Geny diagram are plotted to the area of lamproite. These rocks petrochemically belong to the potash-ultramafic and characterized by K2O>Na20, K2O/Na2O=20.85--66,51.They have a higher content of REE and the REE patterns display an enrichment of LREE, which are similar to that of Vest Australia. The experiment of mineral separation indicated that there is a small amount of diamond in the D5 body,