Pinctada martensii, one of the important species for marine pearl culture, has brought about high economic and social benefits for the coastal communities. In this study, the effect of suspended sediment particles on the feeding physiology (clearance rate CR, ingestion rate IR and absorption efficiency AE) was investigated by adopting the measures of experimental ecology in laboratory to provide both insight into tolerance of P. martensii to environmental changes and guidelines for healthy culturing of P. martensii. The results were as followed: (1) The total suspended particle had significant effect on clearance rate of P. martensii (P<0.01), with peak value of clearance rate of P. martensii occured as the total suspended particle varying from 12.6 to 500 mg/L. Compared with the maximum value of 1.12 L·ind^-1·h^-1 at a concentration of 50 mg/L, the clearance rate of P. martensii reached the minimum value of 0.17 L·ind^-1·h^-1 at a concentration of 500 mg/L, decreased by 85%. The relationship of the clearance rate and the total suspended particle could be expressed by a function as: CR =-0.701＋1.627×TPM-0.463×TPM²＋0.036×TPM³ (R²=0.928). (2) The total suspended particle had significant effect on ingestion rate of P. martensii (P<0.01), the ingestion rate of P. martensii increased with increasing suspended particle concentration from 12.6 to 50 mg/L and decreased with suspended particle concentration above 50 mg/L, with the maximum value of 38.28 mg/h at a concentration of 50 mg/L. However, the ingestion rate of P. martensii reached the minimum value of 16.22 mg/h at a concentration of 500 mg/L, which reduced to 58% compared with a concentration of 50 mg/L. This showed that the ingestion rate of P. martensii was less affected in contrast to the clearance rate, implying P. martensii was able to reduce clearance rate for maintaining relatively stable ingestion rate with increasing suspended particle concentration to maintain normal energy balance and to adapt to change of environment. The relationship between the ingestion rate and the total suspended particle could be described by a function as: IR =-46.631＋70.957×TPM-18.385×TPM²＋1.367×TPM³(R²=0.907). (3) The absorption efficiency of P. martensii decreased from 48.57% to 8.56% with increasing suspended particle concentration from 12.6 to 50 mg/L. This suggested that the organic content decrease with increasing suspended particle concentration, causing reduction of the absorption efficiency of P. martensii. The relationship of the absorption efficiency and the total suspended particle could be described by a function as: AE =52.189＋0.132×TPM-3.111×TPM²＋0.316×TPM³ (R²=0.976).