Synthetic method for organically compounding intermediate cyanogen

Provided is a synthetic method for organically compounding intermediate cyanogen. The method mainly comprises the following steps that 5 moles of 1,4-diiodobutane dissolves in 5 liters of acetone solution, the stirring speed is controlled at 110-150 revolutions per minute, 6-7 moles of 4-methyl-benzonitrile is added into, the temperature of the solution is heated to 60-70 DEG C, circulation refluxis carried out for 90-110 minutes, the temperature of the solution is reduced to 10-15 DEG C, filtering is carried out, a filter mass is washed by a methylamine solution, and then poured into a potassium iodide solution, stratification occurs, an oil layer is washed by a sodium chloride solution, pentane solution and ethyl acetate solution in sequence, reduced pressure distillation is carried out, cut fraction of 50-55 DEG C is collected, dehydration is carried out by using a dehydrating agent, and finished cyanogen is obtained.