介绍了云南东川金沙江变质杂岩的地质背景，较详细地分析了变质杂岩的岩石学、岩石化学特征，鉴定出钠长黑云片岩、浅变质火山岩的原岩为细碧质凝灰岩，可与下元古界河口群变钠质火山岩系对比，是昆阳群地层的基底变质岩系，它的出露可能是地壳多层次伸展滑脱的结果，为进一步探讨该区的地质构造演化提供了事实基础． The geological background of the Jinshajiang metamorphic complex in Dongchuan, Yunnan Province is introduced. The petrological and petrochemical characteristics of the metamorphic complex are analyzed in detail. The original rocks of the albite schist and the shallow metamorphic volcanic rocks are identified as fine bitumen, It can be compared with the Na-Pb volcanic rocks of the Lower Proterozoic Hekou Group. It is a basement metamorphic series of the Kunyang Group strata, and its exposure may be the result of multi-level crustal extensional detachment of the crust. This study provides the basis for further exploration on the evolution of geological structure in this area The factual basis.