Abstract:There are 16 and 8 species of insect pests and their nature enemies of 1～5 year old plantation of Pinus massoniana. The rates of the trees damaged and the main shoots damaged by Dioryctria rubella Hampson reached 12.0% and 7.2% respectively in 5 year old plantation of Pinus massoniana. The height growth of the current year damaged main shoot was 0.1m shorter than that of the healthy main shoot. The damage rate of height growth reached 14.7%. Dioryctria sp. bored the trunk, caused the pine tree die, the tree damaged rate reached 3.2%. This paper also represents parasitic habits of two important natural enemies of insects, Macrocentrus watanabei van.Achterberg and Apanteles sp.