Pollen assemblages of profile ZK₂ (116°12'50"E, 29°44'30"N, 7.83m a. s. 1.) are studied to reconstruct the paleoclimate of Hukou arca, Poyang Lake. According to the pollen diagram, 8 assemblage zones have been distinguished in an ascending order as follows; Ⅰa, Pinus-Quercus-Liqidamber(20.2-17.6m); Ⅰb, Pinus-Cyclobalanoopsis(17.6-16m); Ⅱ, Pinus-Microlepia (16-13.7m); Ⅲa, Pinus-Castaneae-Cyclotbalanoopisis (13.7-11.2 m); Ⅲb, Pinus-Microlepia (11.2-10.5m); Ⅲc, Pinus-CycLobanlanoopsis (10.5-7.5m); Ⅳ, Pinus-Pteris-Gamineae(7.5-2.0 m); Ⅴ, Pinus-Microlepiu (2.0-0m). Based on the above statement, 6 phases of climate fluctuation were shown in the past 4 500 years:4.5~3.8kaB. P., warm and wet; 3.8~3.4kaB. P., cool and little dry; 3.4-3. OkaB. P., warm and little dry;around 3. OkaB. P., cool and wei; 2.8-2.3kaB. P., warm and wcl; 2.3kaB. P.-present, fluctuated frequently.