The embryonic and larval development in Salvelinus leucomaenis was studied for the first time by 4 different methods of fixation by Bouin's,by 5% formalin,by transparent agent and vivisectional observation.The zygote of S.leucomaenis was demersal,telolecithal,orange and spherical.At 3.40-8.89℃,the larvae with a yolk sac hatched after 6 stages of embryonic development which lasted for 1 944 h.The body of the newly hatched larvae measured 17.89 ± 0.32 mm in length.Pterygiophore developed completely and the"parr.mark" appeared on the 73rd day post-hatch.On the 350th day the larvae were almost the same as adult fish in their appearance.The characteristics of the embryonic development in Saleucomaenis were discussed by comparison with other species.The ideal method for researching the eggs with thick membrane was to strip the membrane after eggs were fixed by Bouin's fluid.