An encryption machine fault processing method and an information processing system

The invention provides an encryption machine fault processing method and an information processing system. The method comprises the following steps: one agent machine in the plurality of agent machines detects the fault state of the corresponding encryption machine; when one proxy machine determines that the corresponding encryption machine is in a fault state, an interface between the proxy machine and the service system is forbidden, and when the service system monitors that one proxy machine forbids the interface, the security call corresponding to one proxy machine is sent to the other proxy machine of which the interface is not forbidden in the plurality of proxy machines. Fault detection is carried out on the corresponding encryption machine through the agent machine; interface disabling is carried out on an agent machine corresponding to the encryption machine in the fault state; According to the method and the device, isolation of the faulty encryption machine is realized by disabling the proxy machin