There exist two-layer structure" orebodies in the Dapingzhang Cu-polymetallic deposit. Massive sulfide samples from the upper ore bed and veinlet-disseminated sulfide samples from the lower ore canal of the deposit were analyzed for REE contents by ICP-MS. The chondrite-normalized REE patterns of massive sulfide samples are all characterized by positive Eu anomaly, and those of veinlet-disseminated sulfide samples by negative Eu anomaly. The variation of Eu anomaly in sulfides of different mineralized belts can serve as an indicator of the evolutionary character of ore-forming fluids. A comparison with the REE patterns of hydrothermal sediments and black-smoker fluids from the TAG of the mid_Atlantic ridge suggests that metallogenesis of the deposit is related to volcanic-exhalative-sedimentation.