Abstract: The report which follows studies on the embryonic development of Misgurnus anguillicaudatus.The haploids had the obvious haploid syndrome.The development rate of gynogenesis haploids,compared with that of diploids was the same before Melanoid eye stage.But it was hardly to identify the developmental stages of gynogenesis haploids after Melanoid eye stage.The gynogenesis haploids couldnt survival for more than 15 days in 22℃ to 25℃.We had also made comparative studies on the morphogenesis of the internal orgens of the diploids at the exhaustion of york stage and those of the haploids at the same development ages as the diploids.The rusults showed that most internal organs of the haploids were imperfect and the nuclei were small,but the nucleo-cytoplasmic ratio of the cells was normal.