In the Northeastern Jiargxi whexe ophiolite develops occur high temperature metamorphic rocks including various hornstones, diopsidite and melilite marble and high pressure metamorphic rocks, such as aragonite-jideite bIueschist, lowsonite schistose marble and piemontite-chloritoid schist, Both kinds of these metamorphic rocks are emerged only within the Proterozoic formation and associated in space with the ophiolite. There are indicatiors that a magmatism-thermometamorphic mechanism is occured during the developmen+. of the continent margin ophiolite. From mention above and the fact that the high pressure metamorphism is supe- rimposed on the high temperature metamorphic rocks, the authors suggest that the high temperature metamorphism is related with the madrnatism in the early stage of extension of the ocean basin where the ophiolite development, and the high pressure metamorphism is occured in the tectonism in the late stage compre- ssion of the ocean basin. This mechanism is called by us as"superimposition mOrphlSm"which is differenr: from the paired metamorphism.