[Objective] The adaption of Amorpha fruticosa through root morphological responses to saline stress was explored, in order to provide support for vegetation optimization and restoration in saline areas.[Methods] we used the annual Amorpha fruticosa seedlings as test materials, and analyzed plant height, basal diameter and the root morphological characteristics such as root length, surface area, volume, and number of root tips of Amorpha fruticosa seedlings under saline stress.[Results] As the salt concentration increases, the plant height, basal diameter, and total root and middle root configuration indexes of Amorpha fruticosa increased first and then decreased. When the saline concentration was 0.3%, except for the fine root volume, all other indexes reached the maximum value, and all showed significant promotion effects (p<0.05). When the saline concentration was 0.9%, all indicators were significantly inhibited (p<0.05).[Conclusion] When the saline concentration was 0.3%, the root growth of Amorpha fruticosa was significantly promoted; when the concentration was higher than 0.5%, the root system showed different degrees of growth declining; when the saline concentration reached 0.9%, its growth was significantly inhibited.