To explore the chain reaction process of failure diffusion when a command and control（C2） network nodes are attacked， based on the asymmetric dependent C2 network model， the initial load is defined by the comprehensive importance of nodes， and the capacity load nonlinear model is used to calculate the node capacity. Based on the characteristics of the physical and logical layers of the C2 network， optimal allocation strategies for failed node capacity and non-uniform load adjustable reassignment strategies are proposed， respectively， a cascading failure model suitable for C2 networks is constructed， and tthe impact of key parameters on the invulnerability of cascading failures in C2 networks is analyzed using numerical simulation. The research results show that the capacity margin differentiation parameter is positively related to the cascade failure scale of C2 network， while the node overload parameter and load partition coefficient are negatively related； faced with attacks， accusing the network of seepage failure， dependent failure， and overload failure， the network becomes more fragile； compared with existing models， the constructed model can more effectively suppress cascading failure propagation and improve network invulnerability.
