Objective To systematically analyze the evolving trends in research on childhood obesity and precocious puberty using bibliometric and bioinformatic methods, and to explore their potential shared molecular mechanisms. Methods The articles on childhood obesity and precocious puberty published between January 2005 and March 2026 were retrieved from the Web of Science Core Collection. VOSviewer and CiteSpace were used to visualize publication trends, collaborations among countries, institutions and authors, as well as keyword evolution. Concurrently, shared targets were identified by integrating the GeneCards, OMIM, and DrugBank databases. A protein-protein interaction network was constructed, followed by GO, KEGG, and DO enrichment analyses. Results A total of 214 articles were included. The annual publication output showed an overall upward trend, with the United States and China being the major contributing countries. Keyword analysis revealed that the research focus in this field had gradually shifted from epidemiological descriptions in the early stage to mechanisms involving metabolic abnormalities, neuroendocrine regulation, and environmental factors. A total of 1 392 shared genes were identified. The protein-protein interaction network suggested that TP53, AKT1, CTNNB1, ESR1, EP300, STAT3, EGFR, and MYC might serve as core nodes. Enrichment analyses indicated that the shared genes primarily involved the biological processes such as transcriptional regulation, hormone response and signal transduction, and were significantly enriched in signaling pathways including PI3K-Akt, MAPK, FoxO, cAMP, and AGE-RAGE. Conclusion Researches on childhood obesity and precocious puberty are shifting from phenotypic association analysis to integrated mechanistic investigation. Core genes such as AKT1, TP53, and ESR1, along with pathways including PI3K-Akt and AGE-RAGE, may play important roles in the comorbidity of these two conditions, providing clues for future mechanistic studies and early intervention.