Abstract: There is abundant wild pest-killing plant resources in Changbai Mountains, where the climate is temperate. After three years of investigation, the results of investigation are reported for the first time in this paper. There are wild pest-killing plants in 57 families, 130 genera, 176 species in all together in Changbai Mountains, among which, there are trees: 13/15/17; shrubs: 8/8/8; timber vines: 2/3/3; perennial herbs: 34/65/92; annual and biennial herbs:17/32/45; herb vine: 11/11/11. 35 species of main wild pest-killing plants, distribution of the wild pest-killing plants in five different scenery zones and some other utilities are introduced, the concrete suggestions of exploitation and protection are given. The paper provides source material for further studying the wild pest-killing plant resources in Changbai Mountains.