The utility model relates to a communication technology field discloses a communication device, including first combiner, second combiner, GSM module and TDD -LTE module, the first port of GSM moduleis connected with the GSM frequency channel port of first combiner, and the second port of GSM module is connected with the GSM frequency channel port of second combiner, the TDD -LTE frequency channel port and the first port of first RF switch of first combiner are connected, the output and the input of first down radio frequency circuit of first RF switch are connected, the output of first downradio frequency circuit is connected with the first input end of second RF switch, the first port of second RF switch is connected with the TDD -LTE frequency channel port of second combiner, the output and the first input that goes upward the radio frequency circuit of second RF switch are connected, the first output that goes upward the radio frequency circuit is connected with the first input end of first RF switch. Because this communication device is integrated GSM module and TDD -LTE module simultaneously to make its speech quality that can guarantee the user can guarantee user's data transmission demand again.