Abstract: In the present paper, 18 species, 2 varieties and 2 forms of Vaucheri-aceae from Northeasten China are reported. Vaucheria lcyana is deseribedas a new species belonging to the Section Cornciculatae, Subsection Ra-cemosae. V. racemosa f. longislipitata is a new form. V. schleicheri, V. taylorii, V. prona and V. birostris, V. bursata var. major are first reported in China. V. undulata, V. uncinata and V. veriticallata are new recordsfrom Northeastern China.#br#The authors propose some ideas about ecology and dis tribution ofVaucheriaceae from Northeastern China. And some taxonomic problemsof this family are discussed.