Ｐｂ、Ｓｒ、Ｎｄ 和Ｏ同位素的共同制约表明大容山花岗岩套的源区物质是上地壳岩石， 至少经历过两阶段的演化， 其μ值的主要变化范围为１０ ～１０－２， 地壳存留年龄为１ １００～１ ５００ Ｍａ。Ｓｒ－ Ｏ 同位素体系表明浦北和台马岩体的物质来源均一化程度高， 在成岩阶段及其以后基本保持封闭； 而旧州岩体是两种硅铝物质混合重熔的产物， 并未达到充分的均一化。δＤ－ Ｈ２Ｏ 体系表明大容山花岗岩套各岩体的主要形成方式是结晶分馏 The common constraints of Pb, Sr, Nd and O isotopes indicate that the source material of the Dagangshan granitoid is upper crustal rock and has undergone at least two stages of evolution. The major changes in μ value range from 10 to 10-2, The age is 1 100 ~ 1 500 Ma. The Sr-O isotopic system indicates that the material sources of the Pubei and Taima masses are homogenized to a high degree and remain closed during and after the diagenesis stage. The Jiuzhou granite is the product of two remelted silicon and aluminum compounds, To achieve full uniformity. The δD-H2O system indicates that the major formation of the granites in the Dagangshan granitoid is crystallization