To enhance the quality of long-term light curves for active galactic nuclei (AGNs), we bin and stack multi-epoch images to balance temporal resolution with improved depth. As a case study, this method is applied to Zwicky Transient Facility (ZTF) observations in the Extended Groth Strip (EGS) field. The overlapping region covers approximately 370 arcmin² and includes g-band and r-band data collected from March 2018 to December 2024. The co-added images are about 2.0 to 2.5 magnitudes deeper than the single-epoch ZTF exposures. Using these co-added images, we constructed light curves for 73 AGNs in the EGS field. Compared to conventional ZTF light curves, ours preserve consistent long-term variability trends while achieving higher photometric precision. Furthermore, this method can help detect AGNs with weak variability which are missed from the traditional ZTF data due to the noisy light curves or below the detection limit in ZTF's single-epoch exposure. This dataset provides a catalog of 73 confirmed AGNs in the EGS field, containing high-quality, long-term stacked light curves in the ZTF g and r bands, along with redshifts, variability amplitudes, black hole masses (where available), and other ancillary properties. Additionally, visualizations of the light curves are available in three HTML files: Case‑1 (8 AGNs), Case‑2 (29 AGNs), and Case‑3 (36 AGNs).