A total of 57 samples were collected in May (Spring),July (Summer) and October (Autumn) 2011 from Zhalong National Nature Reserve in Heilongjiang Province,China.In the process of identity,six taxa belonging to 5 genera were newly recorded in China,they are Cosmocladium pusillum Hilse,Cosmarium medioretusum Coesel,Cosmarium subprotumidum var.pyramidale Coesel,Actinotaenium diplosporum var.americanum (West et West) Teiling,Staurastrum bibrachiatum var.elegans (West et West) Prescott,Xanthidium cristatum var.uncinatum f.polonicum Gutwingski.