With China's announcement of “carbon peak” and “carbon neutrality” and goals, distributed photovoltaic has became an important way to promote energy conservation, enable sustainable utilization of renewable energy and deliver economic benefits, which is highly consistent with the goal of achieving “carbon peak” and “carbon neutrality”. At present, the layout design of distributed photovoltaic modules is manually arranged by using different software after exploring the roof one by one. The above process is inefficient and has potential safety risks to personnel. Based on this, this paper studies the digital automatic arrangement technology of distributed rooftop photovoltaic modules, and realizes the automatic design of photovoltaic modules by constructing digital photovoltaic module arrangement algorithm. It can not only shorten the design cycle, but also further improve the land utilization rate and power generation efficiency through algorithm optimization, providing scientific and efficient technical support for subsequent station operations.