The invention relates to a method for producing inflaming retarding modified nitrilon. The method is characterized by comprising the following steps of: firstly, adding nitrilon into copper ion-containing aqueous solution, and reacting the nitrilon with the copper ion-containing aqueous solution to obtain copper ion-containing nitrilon; secondly, soaking copper ion-containing yarns or copper ion-containing woolen yarns into mixed solution which consists of a guanidine reagent and a reaction aid for a certain time; and finally, performing squeeze-drying or spin-drying on the nitrilon together with the mixed solution or only the nitrilon into the nitrilon containing a certain amount of the aqueous solution, and putting the nitrilon into a high temperature and high pressure steaming sizing pot to perform dry blowing or steaming for a certain time under the condition with a high temperature to obtain the inflaming retarding modified nitrilon. According to the method, the nitrilon can be processed into the inflaming retarding modified nitrilon by only adopting the simple high temperature and high pressure steaming sizing pot and few matching processes and devices, the technology for producing the inflaming retarding nitrilon is greatly simplified; and the method for producing the inflaming retarding modified nitrilon has the advantages of low equipment investment, low production cost and easy realization of industrialization.