This paper presents the systematic analytic result of rare earth elements (REE) from the granitic rocks associated with two-large molybdenum deposits, which may have provided some special information for the origin and evolution of the granitic rocks in the area. 1 .The REE patterns of the Laoneushan granitic batholith and Shijiawan graniteporphyry exhibit a rightward declined curve with a fai址negative Eu anomaly. The REE have content of 207.11-268. 52ppm, HREE/LREE=0.03- 0.06, and δEu=0.45- 0.55.The Laoneushan batholith and the Shijiawan graniteporphyry, showing a similar chondrited normalized REE curve, are produced at the same evolution stage by magma derived mainly from crustal remelting, The Shijiawan graniteporphyry is a branch of the Laoneushan batholith. 2. The Jiaduicheng graniteporphyry bordered with the ribbon rocks is petrochemically characterized by high content of F, K, Mo and HREE and depletion in Ba, Sr, Ca and LREE, The REE values of this rock range from 117.10 to 140.20ppm with HREE/LREE=0.13-0.15 and δEu=0.46-0.47. The REE pattern of ,the graniteporphyry is presented as a rightward declined curve with negative Eu anomaly, This unique REE pattern can only be interpreted by thermogravitation diffusion of magma, which may be used for evaluation of molybdenum-bearing granitoids. 3 .The variation of LREE and HREE in the altered granitoids in a great degree is a result of the multiphase hydrothermal alteration. With increase of F in ore-forming solution, the LREE content in the altered granitoids becomes depletion, while the HREE still maintains unchangeably. These suggestions mentioned above are consistent with the result of the petrographic and isotope studies.