Abstract: With the rapid development of economic and financial market, the associated credit risk is widespread in the affiliated enterprises. Associated credit risk control strategy has been widely considered as a hot but difficult problem in the credit risk management. Based on the epidemic model and complex network theory, the influence of control strategy on the associated credit contagion and the stability of the affiliated enterprise network are discussed. The results show that the control strategy is an important factor affecting the stability of the affiliated enterprise network. Simulation analysis illustrates:First, when the network of affiliated enterprise is risk stable, control strategy is proved to be valid in making the network achieve risk-free stability; Second, when the network of affiliated enterprise is in risk-free stable situation, the use of control strategy can help to shorten the time to be in risk-free stable, and can also reduce the peak value of infected enterprises in the process of credit contagion; Finally, under certain conditions, the treatment strategy is shown to be more effective than the immunization strategy in the control of the associated credit risk. The study of this paper has theoretical and practical significance to prevent and control the contagion of associated credit risk in the affiliated enterprise network.

Key words: affiliated enterprises network, associated credit risk, control strategy, network stability