The embryonic and post-embryonic development of Triplophysa orientalis (Herzenstein) were observed and described in detail under a microscope with a digital camera.The results showed that the mature unfertilized eggs of T.orientalis were viscous, ovoid, with a diameter of 0.97-1.11 mm, and characterized by tiny adhesive when encountering water.At a water temperature of （16±0.5）℃, the embryonic development lasted 132 h and 9 min, with a cumulative temperature of 2 113.6℃·h.Additionally, the embryonic development can be divided into seven physiological periods including blastoderm formation stage, cleavage stage, blastula stage, gastrula stage, neural stage and organ formation stage.The newly hatched larvae was （4.86±0.09） mm in length and the post-embryonic development lasted 34 days at a water temperature of （16±0.5）℃, which can be divided into the yolk sac and post larvae stage, lasting 9 and 25 days, respectively.