HALD is a graph database-based platform for exploring the human aging and longevity-related knowledge graph. Up to November 2023, 12,257 entities in 10 types (gene, RNA, carbohydrate, peptide, lipid, protein, pharmaceutical preparations, toxin, mutation, and disease) had been recognized, and 116,495 relations between the entities had been extracted from 342,651 biomedical journal articles on PubMed related to human aging and longevity. 1,871 and 531 entities were further identified as aging and longevity biomarkers.