Benthic foraminifera picked out from the interval of 43.02~26.27 mbsf (meters below seafloor) of ODP 807 (3°36.42′N, 156°37.49′E, water depth 2 803.8 m, length 822.9 m) on the Ontong-Java Plateau, western Pacific was studied for understanding the changes in paleoproductivity and its relation with deep water circulation during the period of 2.5~1.6 Ma B.P.. The benthic foraminifera accumulation rate(BFAR), Epifaunal/Infaunal ratio(E/I), percentage of Uvigerina spp.and total organic carbon (TOC%) were used as the proxies of paleoproductivity in this study. The results show that the change in paleoproductivity was generaly high in glacials but low in interglacials during the period of 2.5~1.6 Ma B.P., except Bulimina alazanensis, of which the paleopruductivity was low in glacials but high in interglacials.