Abstract: The slow-release attractant for Monochamus alternatus were prepared by the attractive active agent and the slow releasing matrix with high absorbability, which was mainly composed of 2 monoterpene, acetaldehyde, acetone, alcohol, microcrystalline carbon, bentonite and the rate was 0.20∶ 0.06∶ 0.06∶ 0.08∶ 0.47∶ 0.13. The weight of attractive active agent and slow releasing matrix accounted for 40% and 60% of the total weight of the slow-release attractant, respectively. The slow-release attractant can control the release rates of the active composition, and made the attractive effects steadily and sustainable. The daily mean volatilization rate of the attractive active composition of the slow-release attractant was 0.9 g, which was only 25.0% of the prototype attractant, and could attract 29 species notorious trunk borer, and was a broad-spectrum slow-release attractant. The attractive activity of this attractant to M. alternates was similar with prototype attractant and the effective attractive radius and trap ratio was 70 m and 43.8% in forest, respectively. This slow-release attractant could monitor accurately the adult population dynamics of the main pine stem-borers such as M. alternatus, and trapped and killed effectively the insects, which carried the Bursaphelenchus xylophilus.