The invention discloses a 
cassia siamea 
seedling raising method for quick propagation and forestation. The 
seedling raising method comprises the following steps of firstly, performing deep ploughing and thorough harrowing to crush soil, disinfecting, and arranging a 
seedling bed; disinfecting seeds for 1.5 to 3 hours before 
sowing in March, 
sowing the seeds according to the amount of 3 to 5g / m<2>, and building a shed for shielding light; after 
sowing, watering at the interval of 3 to 5 days; enabling a young seedling to grow seed leaves 28 to 32 days after sowing, 
transplanting when the average seedling height is greater than or equal to 3cm, and mixing 75 to 85 parts of 
humus soil under broad-leaved forests, 12 to 18 parts of farm 
organic manure and 4 to 6 parts of 
calcium superphosphate to form 
nutrient soil; after 
transplanting, watering at the interval of 1 to 2 days; applying 0.8-1.5% of 
urea nutrient solution at 10th to 15th days after 
transplanting, and applying again at the interval of 15 to 25 days, and removing the shed 30 to 40 days after transplanting; taking the seedlings out of a nursery garden, and planting into a forest 55 to 65 days after transplanting when the average seedling height is greater than or equal to 12cm, and the ground 
diameter is greater than or equal to 0.15cm. The method has the advantages that the raising time of the 
cassia siamea can be effectively shortened, the forest can be formed when the age of seedling is one hundred days, the seedling has strong stem and branches, and the 
germination is regular; during transplanting, the damage to main roots and removal of tops are not needed, the 
survival rate of transplanting is high, the seedling recovering period after transplanting is not needed, and the growth is quick; after the seedling is planted for one year, the average seedling height is greater than or equal to 2.5cm, and the average ground 
diameter is greater than or equal to 4.6cm.