In the Xianghualing district, Hunan, along the contact zone of the Yensh- anian ,granite and dolomite occurs a set of metasomatic complexes which belong to the rnagnesioslcarn (orrlation and constitute the Sn, W, Be, Pb and Zn ore-bearing rocks. The granite contains 568 pprn of ΣREE and has the Lower LREE/HREE (l .23) and δEu(0.47).The chondrite-normalized REE pattern of the granite reflects the feature of tlne Sn-and W-bearing granite. The REE patterns of the metasornatic cofnplexes are similar to that of the granite and are different from that of the dolomite, indicating that the metasoaiatic fluid is mainly derived from the granite nuagma. During the greisenization of granite, a large amount of REE was leached and entered the fluids. When these fluids entered the country rocks and they interacted to form Ca-Mg-metasomatites, REE precipitated. As a result, REE of ore-bearing metasomatic complexes in the outer contact zone decreased rapidly (REE=3-7 ppm)，reflecting that the wsvter/rock value increased and meteoric .water was added into the ore-forming fluid. This result also suggests that the migration capacity of REE is limited in the hot fluid, i. e. REE considerably precipitated near the contact zone, the precipitation of HREE orly occurred far from .the contact zone and the mig- ration capacity of HREE was stronger than that of LREE. The L1iEE/IIREE and δEu of each metasomatic zone rocks change regu- larly, which indicates that the constituent concentrations, temperatures, press- uses, acidites and oxydation-reduction potentials of floe fluid phase change systimatically.