The experiment was carried out in April, 1974 at Daiyu Island, Rongcheng xian,Shandong province and materials were obtained from the artificial fertilization. Thedevelopment of the fertilized eggs and pre-larvae stages of the Pacific herring, Clupeapallasi (Cuvier et Valenciennes) was observed and described in this article. At water temperature 10.5-11.5℃, the larvae hatched out for 12.5 days. Thenewly hatched larvae were about 5.94-7.66 mm in total length.