Abstract: In order to elucidate the seed biological characteristics and appearance propertie of Cynanchum Stauntonii, the seed characteristics of Cynanchum Stauntonii were studied, and the seed germination rate of Cynanchum Stauntonii was determined. Effects of GA₃ and CaCl₂ on seed germination including effects of seed extracts on germination of Chinese cabbage and rice seeds were studied. The results showed that the seeds of Cynanchum Stauntonii had the basic characteristics of the seeds of the goose down vine plant, the optimal germination temperature gradient was 35 ℃/25 ℃, and the germination rate was up to 60%; the seeds treated with 200 mg/L GA₃ could make the germination rate reach 71%. The seed extract had a significant inhibitory effect on the root height and seedling length of rice germination.