This paper analyzed the status of biodiversity and man-made activties threaten to the wetlands in the area of Min River Estuary,on the basic of relatively overall survey and data,putting forward countermeasures to wetland and its biodiversity.It concluded that wetland resource covers the area west from Zhuqi,Minhou County,east to Chuanshi Island,Lianjiang County,with tatal area of 459.2 square kilemeter and 10 wetland types.In the study region,6 blocks of wetlands with comparatively large area are collocated like a string of pearl naturally,which provide main inhabitants,feed sites and migration ways for immigrant birds.Wetland of Minjiang River Estuary have plenty biodiversity.There are 465 species vascular plants belonging to 337 genera and 107 families,438 species angiosperm plants belonging to 317 genera and 89 families,61 species of macroinvertebrate,and 118 species of bird with 29 families.4 types of vegetation style including 18 types of formations and 22 types of association are also founded.This paper analyzed the the human activities impacting on the biodiversity of wetland in Minjiang River Estuary,such as environmental pollution,irrationality development form and reclamation activity.Finally it concluded with some countermeasures to wetland and its biodiversity.