Abstract: Lateral transport of DOC (Dissolved Organic Carbon) along the land-river-ocean continuum in terrestrial ecosystems is a key component of biogeochemical cycle. Quantifying the impacts of lateral transport of soil DOC on terrestrial carbon budget is of great significance for a deeper understanding of the global carbon cycle. This study conducted the simulations using the improved community land surface model version 5.0 (CLM5.0) toreveal the spatial and temporal characteristics of global GPP (Gross Primary Productivity) and soil DOC losses during the years 1981 to 2013, and investigated the impact of lateral transport of soil DOC on the terrestrial carbon budget. The results showed that the global soil DOC losses were increased significantly over the years with a multi-year average value of 458 Tg C yr-1. With the lateral transport of the soil DOC, the GPP and NPP (Net Primary Productivity) decreased in most regions of the world except for the northwestern part of South America and some regions of west-central Africa where the GPP and NPP were increased, which can be related to the lower increase in runoff flux and DOC reservoir compared to GPP and NPP. Overall, the global total GPP was reduced by about 8.61 Pg C yr-1 and NPP was reduced by about 7.28 Pg C yr-1 on a multi-year average basis due to the lateral transport of soil DOC. Moreover, the reduction of GPP has an increased trend over the years with an increase in soil DOC losses, while the reduction of NPP tended to be stable. The intra-annual reduction of GPP and NPP has an increased trend from May to July while has a decreased trend from July to November.