本文根据Ｑ开关红宝石激光治疗色素性疾病的原理，设计了用于治疗皮肤色素性病变的Ｑ开关红宝石激光治疗机。通过提高泵浦效率和充电精度，并采用强制水冷的方法冷却，使输出功率和工作稳定性得到提高，输出能量的不稳定度小于±２％ 。脉冲重复频率１ Ｈｚ。非调Ｑ运转时输出能量为２～１５Ｊ／ｐｕｌｓｅ，脉宽大于２ ｍ ｓ；调Ｑ运转时输出能量０．３～２．０ Ｊ／ｐｕｌｓｅ，脉宽为２５ ｎｓ。经临床使用效果较好 This article is based on the Q switch ruby ​​laser treatment of pigmented diseases, the principle designed for the treatment of skin pigmented lesions Q switch ruby ​​laser machine. By increasing pump efficiency and charging accuracy, and using forced water cooling method to improve the output power and work stability, the output energy instability of less than ± 2%. Pulse repetition frequency 1 Hz. Output power is 2 ~ 15J / pulse and pulse width is greater than 2 m s in non-Q-switched operation. Output power is 0.3 ~ 2.0 J / pulse and pulse width is 25 ns in Q-switched operation. The clinical effect is better