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研究了冲绳海槽南部33个表层样，共分析鉴定底栖有孔虫93属139种．建立了三个底栖有孔虫组合和两个亚组合：①Cibicidoidespraecincta-Pyngospp．组合；②Cibicidoides-Uvigerina组合：aCibicidoideswuellerstorfi亚组合，bHyalineabalthica-Buliminaaculeata亚组合；③Eggerella-Trochamminaglobigeriniformis组合．陆架坡折区以瓷质壳和螺旋壳类为主；大陆坡区的优势类群为瓶虫类、列式壳类和螺旋壳类；深海槽区主要为胶结质壳类和平旋壳类．水深500In以浅发育暖温和温水型有孔虫属种，可能是黑潮暖流影响结果；500m以深的深海、半深海低温属种占优势．月底栖有孔虫群确定的冲绳海槽南部地区溶跃面深度为1600m左右．
In the southern Okinawa Trough, 33 surface samples were analyzed and 139 species of benthic foraminifera were identified. Three benthic foraminiferal assemblages and two sub-combinations were established: ①Cibicidoidespraecincta-Pyngospp. Combination; Cibicidoides-Uvigerina combination: aCibicidoideswuellerstorfi subgroup, bHyalineabalthica-Buliminaaculeata subgroup; andEgegerella-Trochamminaglobigeriniformis combination. The continental slope and slope are dominated by porcelain shell and spiral shell. The dominant groups in the continental slope are bottleworm, columnar shell and spiral shell; The water depth of 500In is shallow warm and warm water type foraminifera, which may be the result of the influence of Kuroshio current. The deep sea and semi-deep sea species with a depth of 500m are the dominant species. At the end of the month, the dissolved surface depth of the southern Okinawa Trough determined by the habitat foraminifera group is about 1600 m.