The invention belongs to the technical field of organic syntheses, and specifically relates to a compounding technology of chloroethyl n-propyl ether. The compounding technology comprises the steps of adopting an efficient catalyst taking 2-n-propoxyl ethyl alcohol and thionyl chloride as main raw materials; strictly controlling the reaction speed by dripping the thionyl chloride; obtaining a crude product through temperature rising and temperature preservation; obtaining the chloroethyl n-propyl ether through rectification and purification. The product appearance is clear and transparent, the purity is more than 99.22 percent, the yield is greater than 98.53 percent, and the water content is smaller than 0.19 percent; compared with the prior art, no wastewater is generated, fore-distillate and a kettle bottom material which are generated by rectification and the catalyst can be recycled, the purity and the yield are high, the water content is low, and the compounding technology is suitable for industrial production.