The filtration rates of four kinds of bivalves that were cultivated dominantly around Xiamen sea area were measured by using a laboratory flowing system. The experimental results were shown below: (1) Filtration rates were measured in the range of 54 - 74.8 ml/ (g·min) among the four bivalves , sequencing descently Saccostrea cucullata > Sinonovacula constricta > Mytilus viridis > Rudi-tapes philippinarum. (2) The relationship between filtration rates on individual size showed a negative exponential function (FR = aW~b, FR’ = aW~(b-1)), with b - 1 =- 0.435 6 and -0.392. (3) Filtration rates on Skeletonema costatum were much higher than on Alexandrium tamarensis and Scripp-silla trochoidea inS. cucullata and R. philippinarum. (4)FR’on algal densities was also shown a negative function (FR’ = aD~(b-1)), with b -1 =- 0.143 and -0.215 2 in S. cucullata and R. philippinarum , respectively. The filtration rates of four kinds of bivalves that were cultivated dominantly around Xiamen sea area were used by a laboratory flowing system. (1) Filtration rates were measured in the range of 54 - 74.8 ml / (g · Min) among the four bivalves, sequencing descently Saccostrea cucullata> Sinonovacula constricta> Mytilus viridis> Rudi-tapes philippinarum. (2) The relationship between filtration rates on individual size showed a negative exponential function (FR = aW ~ b, FR ’ (3) Filtration rates on Skeletonema costatum were much higher than on Alexandrium tamarensis and Scripp-silla trochoidea in S. cucullata and R. philippinarum. (aW ~ (b-1)) with b - 1 = -0.4356 and -0.392 4) FR’on algal densities was also shown in a negative function (FR ’= aD ~ (b-1)) with b -1 = - 0.143 and -0.215 2 in S. cucullata and R. philippinarum, respectively.