1, Appearance difference: Sophora japonica is a deciduous tree, up to 20 meters, with a spherical crown. Bark is grayish black and longitudinally split. Branchlets are green, smooth and have obvious yellow-brown lenticels. Robinia pseudoacacia is also called Robinia pseudoacacia. Deciduous trees, height1-25m; Bark is brown with longitudinal cracks.

2. Different flowering periods: the flowering period of Sophora japonica is July-August, and that of Sophora japonica is April-May.

3, the leaf shape is different: the leaves of Sophora japonica are oval, and the apex is acute. The leaves of Robinia pseudoacacia are oval with rounded or slightly concave tips.

4. Different fruits: The fruit of Sophora japonica is a rosary pod. The fruit of acacia is a flat pod.

5, the difference between bark: acacia bark is thicker, the grain is more obvious, and the bark is more detailed. The bark of Sophora japonica is thinner and the skin is rough.