The invention belongs to the technical field of compound preparation, and particularly relates to a preparation method of tetrabromobisphenol A bis(dibromoalkane)ether series compounds. The preparation method includes the following steps that tetrabromobisphenol A, methyl alcohol and water are mixed evenly, alkali is added and stirred to be completely dissolved, chloroalkene is dripped, and an intermediate is obtained; the intermediate is dissolved in an organic solvent, a catalyst is added and stirred to be completely dissolved, bromine is dripped, heat-preserved reflux is carried out, standing is carried out for layering after a reaction is finished, an organic layer is taken, elutriation crystallization, centrifugation and drying are carried out, and the tetrabromobisphenol A bis(dibromoalkane)ether series compounds are obtained. According to the method, the catalyst is added in the bromination process and can change the polarity of the organic solvent, so that by-products generated in the reaction process are reduced, and the content of the end product is increased by about 10%; the bromination reaction temperature is low, the reaction time is short, and reaction conditions are mild and easy to control; besides, production energy consumption is low, no rigorous reaction condition is needed in any step, the product yield is high, product quality is good, and the flame-retardant effect is good.