This data release provides inputs needed to run the LANDIS PRO forest landscape model and the LINKAGES 3.0 ecosystem process model for the temperate-boreal ecotone Great Xing’an Mountains of northeastern China, and simulation results that underlie figures and analysis in the accompanying publication. The study compared the impacts of small and large fires on vegetation dynamics. The data release includes input data for LINKAGES including soils, landtype, and climate data; initial conditions of stands in the study area for LANDIS PRO; and maps of LANDIS PRO output for each model grid cell including total trees, total biomass (Mg/ha), and tree density (trees/ha) in ten-year timesteps. Output for four climate and fire scenarios are included for a 115-year simulation period (i.e., 1985 – 2100). A baseline scenario that applied observed climate and the historical fire regime from (1967 – 2006) was used for model calibration and evaluation. Three climate-change scenarios evaluated interactions between fire size and projected future climate under the GFDL-CM3 model with the RCP8.5 emissions scenario: (1) climate change and no fire, (2) climate change and small, frequent fires, and (3) climate change and large, infrequent fires.