Abstract: In order to improve the flame retardant property of Anti-fcell~ flame retardant fabric,the effects of dyeing and finishing reagents which include H_2SO_4,NaOH,dyes etc on the flame retardant property of Anti-fcell~ fiber have been researched by the methods of LOI test and TG analysis.The results indicate that the LOI value of Anti-fcell~ fiber is decreased greatly by the treatment of H_2SO_4 or NaOH.Mechanism of the effects of H_2SO_4 and NaOH on the flame retardant property of Anti-fcell~ fiber was discussed by thermal gravimetric analysis.Through dyeing experiments,the effect of NaOH was verified and it concluded that direct dyes and reactive dyes were suitable for dyeing Anti-fcell~ fiber.In addition,Na_2SO_4 and H_2O_2 had little influence on the LOI value,and anionic surfactants were more suitable for the fiber.