The Lingshan granite body is a composite intrusive body (Fig. 1) consis- ting of coarse porphyritic hornblende=biotite granite (γ2-2(a)5)，medium-coarse grained biotite granite(γ2-2(b)5)，medium-grained albitized protolithionite grani- te (γA1) and albitized zinnwaldite granite (γAII) formed from early to late in the sequence of γ2-2(a)5→γ2-2(b)5→γA1→γAII The petrochemical compositions, ratios of characteristic elements and ages of these granites suggest that there exists a relationship between these granites. Data of optical properties, chemical compositions (Table 1 and 3) and X- ray diffraction (Table 2) of the feldspars have been presented respectively in the papery forms and structures of the feldspars have also been studied with the aid of microscope (Photos 1-6).The results indicate that there does exist a relationship of differentiation evolution between these granites. The feldspars from the γA1 and γAIIa show many clear metasomatic alteration features; the- refore, the authors genetically consider the albitized protolithionite granite and the albitized zinnwaldite granite to be metasomatic altered granites. It may also be suggested that a rare element-bearing granite was formed as a result of magmatic differentiation and postma}matic metasomatism.