In the letter, we propose an improved model, which is built on AdjointVM. Our model can improve the situation where attackers can successfully intrude two adjacent virtual machines. Because of this situation, it will lead to the collapse of the entire cloud services. This model uses a double circular chain concept, which can be a virtual machine capable of double Intrusion Detection System detections. Therefore, it can effectively resist the two adjacent virtual machines are compromised. Finally, we compare the related methods. Although the proposed scheme consumes more time, it will improve the security invasion of virtual machines.