N-methyl-1-naphthalene methylamine is an organic nitrogen insecticide. It is white crystal, stable to light, heat and acid substances, and fails to decompose in case of alkali. It is volatile to a certain extent. Its insecticidal effect is mainly contact killing, but also has certain stomach toxicity and fumigation. It has a good control effect on a variety of chewing mouthparts pests of grain, cotton, fruit trees, vegetables and tobacco.