The National Meteorological Information Center has established the Global Land Surface Reanalysis System (CRA-40/LAND) using core technologies such as ensemble assimilation algorithms and multi-source fusion methods. The model features a horizontal resolution of Gaussian grid 1152×576 (approximately 34 km) and a temporal resolution of every 3 hours. This dataset is the atmospheric forcing dataset of CRA/LAND, including elements such as 2m air temperature, 2m specific humidity, 10m U wind, 10m V wind, and precipitation. Evaluations and assessments have confirmed the reliable data quality and the products’ effectiveness in various applications.