The invention discloses a perovskite solar battery and supercapacitor integrated part and a preparation method thereof, the part comprises a supercapacitor and two perovskite solar battery packs, the supercapacitor comprises a conductive substrate with carbon electrodes printed on the surfaces, the conductive substrate is arranged between the two perovskite solar packs and is isolated by solid electrolyte layers; each perovskite solar pack comprises a plurality of solar battery units in series, the solar battery units comprise conductive substrates, photo-anodes, perovskite layers and carbon electrodes, wherein the carbon electrodes of the solar battery units on the left end serve as the positive poles of the perovskite solar battery packs and a positive pole of the supercapacitor, the conductive substrates of the solar battery units on the right end are connected with a conductive substrtrate of the supercapacitor, so that electrons generated by illumination are transmitted to a negative pole of the supercapacitor. The part and the method provided by the invention simplifies a preparation technology, reduces preparation cost and realizes the coherence of the efficient photoelectricity energy conversion and memory function based on a perovskite micro energy device.