The Northeastern Tibetan Plateau (NETP) is an important region influenced by the interaction between the Asian monsoon and the Westerlies. Diverse paleoclimate archives, including sedimentary profiles, ice cores, tree rings, surface soils, and meteorological stations, record environmental changes across multiple temporal scales. However, differences in temporal resolution, chronological depth, and proxy sensitivity make direct comparisons among these archives difficult. We present a paleoclimate database for the NETP that integrates these records within a unified framework. The database includes 147 sedimentary profiles, 456 surface soil samples, 23 tree ring width index (RWI) chronologies, 5 ice core records, and data from 73 meteorological stations. The records were standardized using consistent chronological processing and proxy normalization methods to improve cross archive comparability. The database shows internal consistency among regional proxy records. The dataset combines the long term continuity of sedimentary profiles with the high-resolution climate signals preserved in tree rings and ice cores. In addition, integrating surface soil proxies with meteorological observations provides a modern calibration framework for evaluating proxy responses to temperature, precipitation, and elevation gradients. By linking geological archives with instrumental observations across multiple timescales, the dataset supports regional paleoclimate reconstruction and environmental change research in the NETP. The Integrated Multi-proxy Paleoclimate Database for the Northeastern Tibetan Plateau is available at https://doi.org/10.17632/cp7kftnb94.1 (Li, 2026)