This paper introcluces the experience of using warming Yang and recuperating the kidney method on treating insomnia of yang deficiency. The author believes that the pathogenesis of this disease is yang deficiency or lack of mind and sprit preservation which due to yang floating. The symptoms are sleeplessness, dreaminess and restlessness. The clinical effect was satisfactory by treating with Jinkui Shenqi Pill or Zuogui Pill. 3 proven cases were provided in this paper.