Three kinds of coconut oil acyl aromatic amino acid salts were prepared by amination of coconut oil with histidine sodium, phenylalanine sodium, and tyrosine sodium, which containing aromatic cyclic substituents, by a green synthesis method. The composition and chemical structures were confirmed by high-performance liquid chromatography- mass spectrum (HPLC/MS) and infrared (IR) spectra. The properties of the synthetic products were determined. The interfacial properties depend significantly on amino acid types. The critical micelle concentrations (CMC) of coconut acyl phenylalanine sodium and coconut acyl histidine sodium were 9.84×10-5 mol/L and 6.79×10-5 mol/L, respectively, which were far smaller than that of coconut acyl tyrosine sodium (1.54×10-2 mol/L). The sodium coconut acyl amino acid surfactants exhibited good emulsification and foaming stability. The maximum separation time of 10 mL aqueous phase from emulsion was 342 seconds. The foam height reached 157 mm, and the H5/H1 reached 0.898. Hard water resistance of the three amino acid surfactants was equal or better than that of soap. The detergency ability in distilled water of acyl amino acid surfactants was better than multiple traditional surfactants, like sodium linear alkylbenzene sulfonate (LAS) and sodium alpha-olefin sulfonate (AOS), and sodium soap of coconut oil.