The invention discloses a liquid chemistry growing method of a height-oriented ZnO nanocone array. According to the liquid chemistry growing method of the height-oriented ZnO nanocone array, ZnO colloidal sol coats a substrate through a spin coating film method, and a uniform nanoscale ZnO crystal seed layer is prepared through heat treatment; ZnO array growth liquid is prepared with KOH and Zn (NO3)2; a growing face (the face containing the crystal seed layer) of the substrate is suspended and immersed in the growth liquid in an inverse buckling mode, the reaction lasts for 1-12 hours under the condition of water bath at 20-50 DEG C, and the ZnO nanocone array is prepared on the substrate. The liquid chemistry growing method of the height-oriented ZnO nanocone array has the advantages of being simple in equipment and process, easy to operate, low in cost, suitable for industrial production and the like. The prepared ZnO nanocone array has the advantages of being highly compact, uniform in thickness, good in orientation, high in flatness, stable in performance, capable of being firmly combined with the substrate and the like, and has wide application prospects and great market benefits on the aspects of super-hydrophobic surfaces, detectors, piezoelectric frequency converters, ultraviolet laser, solar cells and the like.