The invention discloses an improved method for two-dimensional electrochemical construction of a nano-micro electrical component and belongs to the technical field of electrochemistry. The problems that a nano-micro electrical component prepared by an existing method is high in cost, low in efficiency, poor in performance and the like are solved. The method comprises the following steps that (1), connection electrodes are prepared, specifically, an insulation material serves as a substrate, a mask is horizontally arranged in the middle of the substrate, the substrate is put into a sputtering chamber, a layer of film good in electrical conductivity is deposited on the surface of the substrate, and the mask is removed to obtain the connection electrodes; and (2), the nano-micro electrical component is deposited in a two-dimensional electrochemical mode, specifically, the two connection electrodes are connected with a power source through wires, then the substrate is put into an electrochemical growth chamber, electrolyte is dropwise added between the two electrodes, the temperature is controlled to make the electrolyte freeze, then deposition potential is applied to the electrodes, the substrate is taken out to be cleaned with ultrapure water after sample deposition is completed, and the two-dimensional nano-micro electrical component adhering to the substrate is obtained. The improved method is suitable for preparation of the two-dimensional nano-micro electrical component.