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To improve the flame retardancy and smoke suppression performance of epoxy resins(EP), ZIF-67 was loaded on the surface of chitosan(CS) using a co-precipitation method. The structure and morphology of the resultant hybrid were analyzed by Fourier-transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. The results indicated that the CS/ZIF-67 hybrid was successfully prepared. The effect of different proportions of CS/ZIF-67 hybrid on the flame retardant and smoke suppression properties of EP was studied. The results indicated that the addition of CS/ZIF-67 hybrid improved the UL 94 grade and LOI value of EP composites and reduced the heat release rate and smoke release rate of EP-based composites, The addition of CS/ZIF-67 hybrid effectively improved the flame retardant and smoke suppression performance of EP. The SEM and Raman spectroscopy analysis for the residual char after the combustion of EP-based composites indicated that the addition of CS/ZIF-67 hybrid improved the graphitization degree of the residual char, and a denser carbon layer was formed during the combustion of EP, thus generating flame retardant and smoke suppression effects. [ABSTRACT FROM AUTHOR]