The invention discloses a carrier aggregation terminal device and 
system for mobile communication; the device comprises a master 
processing unit, a slave 
processing unit, a voice 
signal conversion unit, a 
signal coding and decoding unit, a channel coding and decoding unit, a 
wireless MODEM 
time sequence control unit, a first receiving unit, a second receiving unit, and a transmitting unit. The master 
processing unit is electrically connected with the slave processing unit; the slave processing unit is electrically connected with a voice 
signal conversion unit, a 
signal coding and decoding unit, a channel coding and decoding unit, a 
wireless MODEM 
time sequence control unit, a first receiving unit, a second receiving unit and a sending unit. The 
backward compatibility of 4G 
narrowband signals is ensured, the peak rate of the intelligent terminal is multiplied, the 
system throughput is improved, the network KPI index is improved, the 
control channel interference is reduced, scattered frequency spectrums are integrated, and the comprehensive efficiency is improved. In this way, the carrier aggregation technology can integrate and use the discontinuous frequency spectrums, and brings a 
frequency spectrum use effect similar to that of continuous frequency spectrums.