Abstract: Based on 1 265 batches of data obtained from the investigation of mariculture shellfish sanitation monitoring conducted in the middle east of Fujian coast during 2014 and 2018,the quality of mariculture shellfish was analyzed and the safety level of mariculture shellfish was also evaluated according to the guideline "Analytical parameter,method and limited value of the safety of mariculture shellfish in the investigation of mariculture shellfish sanitation monitoring in 2018".Results showed that in the monitoring area,the quality of mariculture shellfish was in good condition in general.Most of the shellfish samples qualified the 1^st class region standard,part of the shellfish samples qualified 2^nd class region standard,and only a few shellfish samples qualified the 3^rd class region standard.Among 6 kinds of mariculture shellfish,including Crassostrea gigas,Sinonovacula constricta, Ruditapes philippinarum, Mytilus coruscus, Mercenaria mercenaria and Meretrix meretrix,the concentration capability of Pb of S.constricta was stronger than other species,while the concentration capability of Cd of C.gigas and M.coruscus was stronger than other species.