Abstract: The development of nanocomposites with high dispersion and good adsorption properties is important for the removal of heavy metal ions from water bodies. Fluorine/carbon-doped hydroxyapatite (FCHAP) was prepared stepwise by microwave/light-wave combined heating assisted chemical precipitation using mixed-acid oxidized multi-walled carbon nanotubes (AO-MWCNTs) as the matrix and hydroxyapatite (HAP) was introduced and loaded onto AO-MWCNTs to synthesize FCH/AO-MWCNTs composites. The results show that the theoretical maximum adsorption capacity of FCH/AO-MWCNTs for Mn(II) is 317.5 mg/g, which is higher than that of AO-MWCNTs and each preparation intermediate. Combined with the characterization results of SEM-EDS, FTIR, XPS, Zeta, and BET, it is speculated that the new material FCH/AO-MWCNTs form more abundant pore structure and adsorption sites, and their dispersion and stability performance are excellent, and at the same time, the new material has broad application prospects in the removal of other heavy metals and recycling.