The invention relates to a production method of sodium ferrocyanide, in particular to a production method of coking industry sodium ferrocyanide and belongs to the technical field of coking product recovery. The technical problems that in the technological process of producing sodium ferrocyanide through an iron powder method, in the process of secondarily absorbing primary reaction liquid, as a large amount of sodium ferrocyanide is contained in the liquid, conveyance, storage and absorption of the liquid are difficult, crystal blocking is caused by any carelessness, and the process control difficulty is high are solved. According to the technical scheme, the easily-crystallized primary reaction liquid is replaced with centrifugal mother liquid.