Abstract: Schleichera oleosa is the best host tree species of Kerria lacca. The trees can grow,flower and fruit normally in hot and dry valley area of Yunnan Province.It begins to bud in early March,and most of which blooms from the middle of March to the middle of April.The flower rate is about 30%,in which 19.2% is male flower and 10.8% is perfect flower (both staminate flower and monoclinous flower). Anemophilous pollination exists between different flowers. One flower cluster of perfect plant has 41 flowers, 60% of which drops,the rate of fruiting at last is 39.9% and the last fruit holding rate is 6.3% of the perfect flower and 38.2% of the beginning fruit. The shattering rates of flower and fruit are very high mainly for strong wind in March and rainwater in May. The seeds take to mature from the end of July to middle of August at Ynanjiang. The shell of seed should be broken that can makes germination rate high. It is highly important to locate a nursery where is full of light and airing.