Sophora japonica is a deciduous tree with a height of 10-20m. Bark gray, black and brown, longitudinally cracked; Branches with needles and hard wood are excellent building trees. The root system is developed. Branchlets are gray-brown, spiny, entire, green on the surface, puberulent, gray-green on the back, with short hairs. Racemes axillary, shorter than leaves, inflorescence axis yellowish brown, sparsely short hairs; Pedicel is 8-13mm long. Pubescent, calyx campanulate, with irregular 5 teeth, short hairs on the surface; Corolla white, fragrant, flag petal nearly round, long 18 mm, base claw, slightly concave apex, oval wing petal, slender base claw, round top, long 18 mm, keel petal bent inward, long base claw; Stamens10,9 and1; The ovary is linear and oblong with short white hairs, the style is almost bent at right angles, the pods are flat, linear and oblong, 3- 1 1 cm long, brown and smooth. Contains 3- 10 seeds with two petals. The flowering and fruiting period is from May to September. Different from Sophora japonica, there are thorns on the branches, and the flowering period is May (late spring).

Robinia pseudoacacia likes sunshine and warm and humid climate. It grows well in places with annual average temperature of 8 ~ 65438 04℃ and annual precipitation of 500 ~ 900 mm, and it is not strict with soil and has strong adaptability. I like silt, sandy loam and loam. The soil is deep, fertile, loose and moist. Not sensitive to soil pH value. It does not grow well on clay and coarse sand, the subsoil is too sticky and hard, and the drainage is not good. Although it has certain drought resistance, it often withers in the severe drought season when it doesn't rain for a long time. Not waterproof and moisture-proof. Afraid of the wind, it grows fast and is an important fast-growing tree species in the world. Shallow roots and dense crowns. Early fruiting and high yield. After 15 ~ 20 years, under good site conditions, the peak volume growth can last for more than 40 years.

It is best to choose sandy loam soil with good watering conditions, good drainage and deep fertility for afforestation. Soak the seeds in hot water before sowing. Sowing is mainly in spring, but it can also be planted in rainy season in particularly dry places in spring. Afforestation methods vary from place to place: in windy, dry and cold areas in winter and spring, dry planting can be used in autumn or early spring; Dry afforestation can be carried out in places with warm and humid climate and less wind, and afforestation in spring is better.