The invention discloses a spreading oil insecticidal composition containing
chlorpyrifos and
buprofezin. The insecticidal composition is prepared from a mixture of
chlorpyrifos and
buprofezin, emulsifier,
solvent,
nonionic surfactant, cosolvent and water dispersing agent. A preparation method for the insecticidal composition comprises the following steps of: mixing the
chlorpyrifos and the
buprofezin in the emulsifier, heating to be at the temperature of between 20 and 80 DEG C, preserving heat, adding the
solvent, the
nonionic surfactant, the cosolvent and the water dispersing agent under a stirring condition, fully mixing uniformly, and standing, so as to obtain an spreading oil agent. When the composition is used, water or soil is not required, any
plant protection instrument is not required, and
pesticide liquid is directly dropped into a
paddy field, can be quickly and uniformly dispersed in the whole field to form a
pesticide film layer and upwards climbs for 20 centimeters from the base of rice stems, so that an aim of preventing and controlling pests is fulfilled; and the composition has the characteristics of high efficiency, long-acting effect,
low toxicity, safety, convenience for use, reduction of labor and cost and the like.