Abstract: With large-scale Distributed Generation (DG) and adjustable loads connected to the distribution grid, maximizing emission reduction at low cost is crucial for low-carbon development of distribution grids. To this end, this paper proposes a source-load cooperative planning method for distribution networks based on load carbon emission characteristics. Firstly, based on the carbon potential and the net load curve of the distribution network, a quantitative model of load carbon emission characteristics considering the carbon emission of electricity consumption, distance low carbon, trend low carbon, and low carbon electricity consumption rate is established to get the priority of low carbon planning for each distribution network within the regional grid; secondly, to minimize carbon emission, a source-load cooperative low carbon planning model of the distribution network is established to get the post-response load characteristic curve, the DG access type and capacity, integrating the zero-carbon power issued by DG and the flexible regulation capability of flexible loads to reduce the system carbon emissions entirely; finally, the carbon emission reduction benefits of the proposed method are analyzed and verified by simulation on the improved IEEE30 node system.