A communication apparatus and a method for the interface layer of a radio frequency identification (RFID) device are provided. The apparatus includes: a connection maintenance pool (11), which is configured to store all connections to be established and information of each connection; a device connector (12), which is configured to initiate a connection request to the RFID device, when detecting a response message returned by the RFID device, the device connector (12) establishes a connection requested to be established by the connection request, occupies resources of a message processor (14) and registers a data processing event in the message processor (14); a connection receiver (13), which is configured to monitor a connection request event, when receiving the connection request event, the connection receiver (13) establishes a connection requested by the connection request event, occupies resources of the message processor (14) and registers a data processing event in the message processor (14); and the message processor (14), which is configured to monitor the data processing event and process the data processing event when the data processing event is monitored. Basing on the apparatus and the method, the RFID device is enabled to be a client terminal and a service terminal simultaneously, thereby requirements in different scenes can be satisfied.