Abstract: Results from the experiment show that the inhibiting substance contained in the seed affect the germination of the seeds of Taxodium assendens. This inhibiting substance can be removed by soaking under the fluctuating temperature of 20—30℃ the seeds germinate rapidly, and the absolute germinating percentage can reach above 90%. When temperature is below 30℃, red light can accelerate germination of Taaodium assendens, green light inhibits the process, while in darkness, the germinating rate is quite low. After the soaking, the seeds are mixed with sand, and then, wrap up with plastic filme and place in the sun and the germination hastening can be achieved with the natural temperature change. After sowing by these seeds, the seedling output can be raised.