The invention discloses a communication device and an abnormality processing method, relating to the field of distributed communication. When a running state is abnormal, a state maintenance unit determines a communication state based on the running state and drives a service processing unit and a communication processing unit to run based on the communication state; the service processing unit and the communication processing unit feed back a running result to the state maintenance unit; and the state maintenance unit maintains the communication state based on the running result. As the service processing and the communication recovery processing are decoupled to be mutually independent and have no mutual interference, so that the communication device and the abnormality processing method, disclosed by the invention, are convenient to trace and confirm problems, can be used repeatedly and efficiently, and are convenient to maintain and upgrade.