Under high speed emulsion, nano-cologne essence capsules were prepared by complex coacervation method using chitosan and sodium alginate as wall materials. The effects of coagulant aid type, cross-linking agent type and cross-linking temperature on the shape, size and distribution of capsules were studied, characterized by TEM and particle size analyzer. The result showed that nano-cologne essence capsules were obtained by using TPP and CaCl2 as coagulant aid, glutaraldehyde as cross-linking agent and cross-linked under 35℃. The nano-cologne essence capsules were regular spherical, had uniform particle size distribution with average particle wet size 160nm and dry size 80nm. TG analysis showed that the initial decomposition temperature of nano-cologne essence capsules were above 200℃, had a good thermal stability. UV-Vis test showed the loading rate and loading efficiency of nano-cologne essence capsules were 34.3% and 87.2%, respectively.