Nuclear divisions of Bangia conchocelis including vegetative and sporangial phases were systemically studied in this research.The Bangia sample was collected from the cultivation frames of Fujian Province.The results showed that Bangia conchocelis has a heterogenesis life history.Both the vegetative and sporangial branch cells of Bangia conchocelis were diploid with 2n=8 chromosomes and the nuclear division was mitosis.Homologous chromosome pairing could be observed till the late prophase in cells of both phases,which proved that somatic chromosome pairing was an important characteristic of nuclear division of Bangia conchocelis cells.