The invention relates to a compounding method for an acaricide bifenazate intermediate 3-nitro-4-methoxyphenyl and belongs to the field of pesticide preparation. The compounding method is characterized by acquiring 3-nitro-4-methoxyphenyl from the reaction of 4-halogenated-2-nitroanisole and benzene halide under the action of catalyst. The reaction process is as follows: 1) uniformly mixing 4-halogenated-2-nitroanisole, benzene halide, catalyst and solvent A under a shielding gas condition, rising temperature to 130-150 DEG C, controlling pressure to 7-12 barometric pressures, reacting for 20-35h and ending; 2) performing vacuum filtration on the system and removing solid insoluble substances, thereby acquiring a filtrate a; pouring the filtrate a into 3-5 times of water, adding a solventB for extracting, layering and then using a drying agent for drying an organic phase, and concentrating, thereby acquiring a solid; re-crystallizing the solid with a solvent C, thereby acquiring 3-nitro-4-methoxyphenyl. The compounding method has the advantages of few steps, higher yield and more convenient operation.