Abstract: The authors explored the effects of four pesticides on two kinds of Arma Hanh. The results showed that cypermethrin, phoxim, imidacloprid and cyanide chrysanthemum had strong influence on the two kinds of Arma Hanh (Armachinensis and Picromeruslewisi), after the two kinds of Arma Hanh were released in natural environment, their survival and reproduction were significantly inhibited. Though herbicide pesticide had no direct influence on the two kinds of Arma Hanh, there were some toxic effects on crops in natural environments, so the Arma Hanh could hardly survive. Therefore, to improve the survival and natural reproduction of Arma Hanh in natural environment, we must strengthen the pesticide management, and the concept of green environmental protection, education and guidance, thus to build stable stereoscopic biocontrol system.