As the Industrial Internet of Things (IIoT) becomes more and more integrated into vital infrastructure, strong security mechanisms are required to protect against any cyber-attacks. In this study, a Blockchain-Driven Software-Defined Network (SDN)-Based Intrusion Detection Framework for the IIoT (SCM) is presented. The SDN principles provide the foundation of the SCM framework, which makes effective control and administration of network resources possible. Through dynamic adaptation to changing network circumstances, SCM improves IIoT system resilience against developing cyber threats. By integrating blockchain technology, security-related data is made transparent and unchangeable, offering an impenetrable trail of occurrences. The SCM architecture is thoroughly described in this article, with an emphasis on the main elements and how they work together. SCM framework offers a strong and efficient way to secure IIoT systems. It solves the dynamic nature of IIoT networks while guaranteeing the integrity and transparency of security-related data by fusing SDN and blockchain technology. SCM’s effectiveness in identifying and reducing intrusions is confirmed by its practical implementation and assessment, which highlights the technology’s potential to improve industrial settings’ security conditions. The SCM framework offers a basis for future study and development in protecting vital infrastructure from new cyberthreats as IIoT continues to emerge.