The Guanzishan intrusion located in the boundary between Suizhou city and Zaoyang county, Hubei Province, consists of jadeite-cancrinite syenite, jadeite syenite and biotite hornblende syenite from centre of the intrusion to margin. This paper stresses the study on the petrology, mineralogy,petrochemistry, REE geochemistry, age and petrogenesis of the jadeite-cancrinite syenite. Its age determined by Rb-Sr isochron is 306 Ma, suggesting that it was formed at Hercynian. On the basis of the occurrence, FeO/MgO, (87)Sr/(86)Sr(i), REE distribution pattern and P. T. conditions of jadeite-forming it is provable enough that the jadeite-cancrinite syenite is genetically related to the upper mantle materials.