The Ediacaran Doushantuo Formation in South China was deposited in a key period of the transition from the original earth-life system to the modern earth-life system.This set of strata recorded the first large-scale phosphorus event in the Earth's history.However,there are still many controversies about the source of phosphorus.The phosphorus in the shallow sea area mainly comes from the riverine weathering products of phosphate minerals on the land surface and the upwelling deliver of phosphorus-bearing water-masses in other sea areas.These two sources can be distinguished by the content and distribution characteristics of whole rock detrital elements and rare earth elements.Based on the comprehensive analysis of the major and trace element of Doushantuo Formation in Xiangdangping and Sidouping sections in the upper Yangtze region,the provenance system and regional weathering have been recovered in this paper.The high correlation of P₂O₅-Al₂O₃ and P₂O₅-Fe₂O₃ indicates that the source of phosphorus is terrestrial weathering input rather than upwelling.The lower Th/Co,La/Sc,Th/Cr ratios,TiO₂-Zr correlation and ternary plots of (Th-Hf-Co and La-Th-Sc) indicate that the major source rock of Doushantuo Formation is basalt.The higher chemical alteration index (CIA) and the lower Sr/Cu ratio indicate that the provenance area was dominated by warm and humid climate at that time and experienced moderate chemical weathering.The big data analysis of phosphorus content in different types of volcanic rocks shows that the phosphorus content in mafic volcanic rocks is much higher than that of felsic volcanic rocks.Therefore,the relatively strong basalt weathering during the deposition of Doushantuo Formation greatly increased the phosphorus deposition flux and marine concentration of phosphorus in the shallow sea shelf area,which offered mass of phosphorus to widespread phosphorus burial,improved the circulation of phosphorus in early oceans,and promoted the global phosphorus event and the radiation of large metazoans.