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In this study, CMC-modified nano-Fe /Ni bimetallic materials were prepared to investigate the influence factors of CMC-nano-Ni-Fe bimetallic materials on the removal of p-nitrophenol from water. The results showed that the PNP removal efficiency of the material first increased and then decreased with the increase of nickel-iron ratio, and the optimal nickel-iron ratio was 0.025.With the increase of the initial concentration of PNP, the concentration first increased and then decreased, and the optimal concentration was 30 mg/L. The reaction is greatly affected by pH, and the removal rate of PNP is acidic ＞ neutral ＞ basic. When the pH is 5, the removal rate of PNP can reach 100% after 120 minutes of reaction. The infrared spectrum of CMC-Fe/Ni composite shows that the vibration absorption peak of CMC functional group decreases with the increase of Ni/Fe ratio, but the overall structure is relatively stable. [ABSTRACT FROM AUTHOR]