Phosphorus-bearing stratigraphies of the Central Guizhou deposited during Doushantuo Period, Sinian, and Meishucun Period, early Cambrian，gathering large phosphorus deposits and make the Central Guizhou important areas prospecting phosphate resource. Among them, Weng’an, Kaiyang and Wenquan phosphorites mainly hosted in Doushantuo Formation, In order to illuminate the ore-forming mechanism and ore-controlling factors of the phosphorus deposit, some typical deposits including Baidou, Chuangdong, Jinzhong, Yingping and Xifeng phosphorus deposits in the Central Guizhou were selected for the research. A detailed study was undertaken that involved field observations, major element and trace element, microbean analysis. The major findings are as follow：1．Through regional survey, the transition of paleogeographic environment was analyzed. The phosphorus deposits of the Central Guizhou formed in Doushantuo Period, and the progress was devided into three stages. In the first and third stages, large-scale transgressions caused phosphorus sediment, in the second stage, the regression led to dolomite interlayer.2. The major element of phosphorite are mainly P2O5、MgO、CaO、F, in which P shows positive correlation with CaO and F, but shows negative correlation with MgO, LOI. The trace element shows enrichment of As、Rb、Sr、Ba、Co、Pb relate to PAAS(Post Archean Australian Shal), the U/Th value of phosphorite range from 2.6 to 27 with an average of 17.5, and the date of Weng’an, Kaiyang phosphorite belong to hydrothermal area in Lg(U)-Lg(Th) diagram. The PAAS-normalized rare earth distribution patterns of phosphorite are characterized by pronounced enrichment of HREE (heavy rare earth element) compared to LREE (light rare earth element) resulting a “left-inclined” REE polt. ∑REE of phosphorite ranges from 28.29 to 507.58ppm with an average of 158.08ppm, and the concentration coefficient of LREE and HREE are 0.53, 1.23. The (Ce/Ce*)SN of phosphorite ranges from 0.54 to 1.08 with an average of 0.83, showing positive anomalies. The (Eu/Eu*)SN varies from 0.94~1.81 with an average of 1.11, showing negative anomalies. These characteristics of trace elements and PAAS-normalized rare earth distribution patterns of phosphorite suggest there was hydrothermal during phosphorite metallogenesis. What’s more, the upwelling caused by transgressions brought material source, participating in metallogenesis.3. Redox condition was analyzed used multiple discriminant indicators including Ce anomlies, V/Cr, V/(V+Ni), Th/U and δU. V/(V+Ni) of phosphorite range from 0.28 to 1.30, with an average of 0.61, and V/Cr of phosphorite range from 0.75 to 5.46, with an average of 2.40. Th/U of phosphorite range from 0.75 to 5.46, with an average of 2.40; δU of phosphorite range from 1.70 to 1.99, with an average of 1.89. All these trace element indicated that metallogenetic environment was anoxic-suboxic. 4. The mineral composition of phosphorite and microstructure characteristics of apites were found out. The mineral types and paragenetic assemblages of phosphorite are simple, EPMA shows that ore mineral is fluorapatite with element composition：Ca：38.31%、P ：17.692%、F：3.487% and gangue minerals consist mainly of dolomite, quartz, feldspar, clay minerals and pyrite followly. Under the observation of microscope, apatite diameters range from 100 to 600, with mutual stripes consist of dolomite stripes and apatite stripes. The micromorphologies of apatite were devided into three types： globular apatite, microbial apatite and amorphous apatite, among them, microbial apatite shows different morphologies including globular, petaloid, concentric ring, irregular cyclic, pistil and aggregation.5. The formation of apatite was discussed through scanning electron microscope (SEM). (1) The sedimentation process of globular apatite was related to sustaining mechanical dynamic of seawater, which caused fine sphericity. (2)The formation of microbial apatite was closely related to microbial growth, which was devided into four stages：algae microorganisms blooms and massive production of EPS, formation of granules by accretionary growth, slow precipitation, formation of isopachous apatite cement. (3) The amorphous apatites are main microcrystalline apatites relate to microorganisms, whose formation is more difficult.6. According to paleogeographic environment and indicators for deposit, prospect forecast of Dousahntuo Formation phosphorite was conducted. Therefore, two prospective areas were delineated: the first prospective area around Kaiyang is mixed flat along Caotang-Pingxi-Longdongin the east of Weng’an-Pingding. The second area is phase field between Gravel beach/ sand beach along Datianba-Wenggong and mixed flat along Xiaobazhai-Wengqing-Dianzishang.In conclusion, the origins of phosphorite may derive from hydrothermal processes. Seawater infiltrated into underground along the deep faults, and then was heated in deep rock. Finally the fluids enriched metallogenic materials upwelled into sedimentary basins by hydrothermal vents or volcanic activities. What’s more, ascending currents resulted by transgression may bring metallogenic materials participated in the mineralization. PO43+ was broght to anoxic water-sediment interface by FeOOH or microorganisms in upper oxic seawater. The pore water enriched in metallogenic materials and these materials was phosphatizationed in sediment, and then enduring broken- carried- rounded- resedimented procees. In diagenetic stages, phosphate was compressed, dehydrated, and cemented by dolomite and other detrital material, and finally formed phosphorite.