[Objective] The effects of drought stress on the seed germination and seedling growth of Sibiraea angustata was investigated in order to provide reference for wild species domestication and population recovery.[Methods] To study the swellingrate, germination percentage, germination potential, germination index, vigor index, seed drought germination index and seedling growth in Sibiraea angustata under different concentrations of polyethylene glycol(PEG-6000) treatments.[Results] With the intensification of the stress level, the absorption process of the seeds of narrow leaves Sibiraea angustata showed three stages:rapid water absorption period, slow rising period and water absorption period, and the germination rate, germination potential, germination index, vigor index and seed drought-resistance germination index, seedling height and root length, and the seedling weight were negatively correlated with the stress intensity. When the polyethylene glycol concentration reached 30%, the germination of seed was inhibited completely. On the other hand, seed germination and emergence, and 50% of the time delay were decreased with the increase of stress intensity. Among them, the most stringent stage is emergence stage, seed emergence process of environmental was more sensitive, and drought capability is weak.[Conclusion] Drought stress significantly inhibited the seed germination and seedling growth, it also suggested that water is one of the dominant factor for the formation of seed germination and seedling growth. Therefore, planting Sibiraea angustata in the arid areas requires consideration of water supply.