The invention relates to a hot fogging concentrate of binary composition containing emamectin benzoate and dursban, and a preparing method thereof, wherein the hot fogging concentrate comprises the following components in part by weight: 0.1-10 parts of emamectin benzoate, 1.0-60.0 parts of dursban, 0.1-20 parts of auxiliary agent, 1-20 parts of cosolvent and the balance being solvent supplemented to 100 parts. The hot fogging concentrate of the invention has the advantages of convenient preparation, low cost, high rain flushing resistance, excellent medical effect, long continuing efficacy, high work efficiency, capabilities of reducing environmental pollution, improving utilization ratio of farm chemical, reducing usage of farm chemical, and adaptability for spraying of hot fog machine.