Research integrating dual circulation with the value chain is notably scarce, particularly lacking analyses on the extent of value chain integration among different provinces and their roles and connections within the value chain.This paper focuses on the 31 provinces of China, using regional input-output tables from 2012, 2015, and 2017 to construct indicators for evaluating provincial-level regional integration into the dual circulation value chain. It analyzes the characteristics of provincial regions under the integration of the dual circulation value chain. Results reveal that: ① Overall, most provinces have higher integration into domestic value chains than global ones, indicating a greater reliance on domestic value chains. However, downstream regions in the value chain are fewer in number, with significant disparities in downstream integration, while upstream regions show a tendency towards excessive concentration, posing a threat to the stability of the value chain. ② In terms of integration features, the division of labor within the value chain is gradually shifting from single-chain circulation to dual-chain circulation. Western and central regions serve as the midstream to upstream of the dual circulation value chain, processing raw materials and transferring intermediate goods to coastal regions through complete supply chain networks. Coastal regions are gradually ascending from the midstream to downstream of the value chain, shifting from semi-finished to finished goods processing, and exporting final products to western, central regions, and overseas. ③ Spatially, the integration between coastal and western-central regions is more pronounced, with coastal regions maintaining close ties with western-central regions with high network density, providing significant value-added, hence, the local value-added content in coastal regions' exports is not notably high.Compared to previous literature, this paper adopts a novel perspective by unifying dual circulation with the value chain within one research framework, focusing on analyzing the dual circulation value chain led by domestic value chains. Furthermore, it incorporates publicly available interregional input-output tables of China into the research system, combining geographic information technology to not only examine the temporal aspect but also the spatial aspect of regional integration into the dual circulation value chain, aiming to provide a feasible method for quantitatively depicting the characteristics of regional integration into the dual circulation value chain. Finally, it adds an analysis of the flow of value-added among provinces to assess the degree of connection within the value chain among provinces. This study sheds light on the division of labor and connectivity among provincial regions within the dual circulation value chain, aiding in optimizing the industrial structure among provinces, accelerating the establishment of a new development pattern, thereby promoting regional coordinated development.