HALD is a graph database-based platform for exploring the human aging and longevity-related knowledge graph. Up to August 2024, 12,654 entities in 10 types (gene, RNA, carbohydrate, peptide, lipid, protein, pharmaceutical preparations, toxin, mutation, and disease) had been recognized, and 120,617 relations between the entities had been extracted from 356,918 biomedical journal articles on PubMed related to human aging and longevity. 1,921 and 555 entities were further identified as aging and longevity biomarkers.