Abstract: By using water-based nickel powder slurry with different solid content, the capillary wick containing the xylem-like pore structure was prepared by the ice-templating method at different freezing temperatures and different sintering temperatures. The micro-pore structure of the capillary wick was observed and the effect of solid content and freezing temperature on the pore structure and property of the capillary wick was studied. The results show that the new capillary wick prepared by the ice-templating method had oriented pores specific to the xylem of plants, and the pore had dual-aperture and showed a well-ordered honeycomb shape. With the increase of solid content, the pore wall thickness of the capillary wick increased, while the pore diameter, porosity and permeability decreased. With the freezing temperature decreasing, the porosity was basically unchanged, while the pore diameter and permeability were reduced. Compared with the capillary wick prepared by traditional sintering methods, the capillary wick by the ice-templating method had greater porosity and permeability.