Abstract: The study was carried out to explore the reasonable seeding time and techniques of Taraxacum koksaghyz Rodin artificial breeding. Effects of temperature and cool or warm pretreatment on the germination of Taraxacum kok- saghyz Rodin seeds were studied by observing their germination characteristics such as germination rate, germination potential, germination index, and vigor index. The results showed that different temperatures significantly influenced germination characteristics mentioned above, which firstly increased and then decreased as temperature increased in the range of 5 to 35℃. Under the condition of 25℃, the germination rate, germination potential, germination index, and vigor index of seeds achieved the maximum value, 85%, 79%, 14.17 and 33.87 respectively, and the germination time was shorter and the germination rate the fastest. Besides, the vigor index of seeds was significantly influenced but germination rate was not by the cool or warm pretreatment. Seeds with pretreatment of 8 to 20 days at 5℃, or 6 to 18 hours at 35℃got higher vigor index than that of the control. Thus, the optimum germination temperature for seeds was 25℃, and pretreatment of 8 to 20 days at 5℃, or 6 to 18 hours at 35℃could improve the germination characteristic.