A slide-type mobile terminal, comprising an upper slide portion and a lower slide portion interconnected with a Flexible Printed Circuit Board, FPC, characterized in that: an auxiliary antenna is located in the upper slide portion while a main antenna is located in the lower slide portion; the upper slide portion further comprises a first signal converting module which communicates with the auxiliary antenna; and the lower slide portion further comprises a second signal converting module and a second antenna signal processing module which connects with the second signal converting module; wherein: the auxiliary antenna is configured to receive and transmit high-frequency signals; the first signal converting module is configured to convert a high-frequency signal received from the auxiliary antenna from a single-ended signal to a differential signal which is transmitted to the second signal converting module by the FPC; and is also configured to convert a high-frequency signal received from the second signal converting module via the FPC from a differential signal to a single-ended signal which is provided to the auxiliary antenna; the second signal converting module is configured to convert a high-frequency signal received from the second antenna signal processing module from a single-ended signal to a differential signal which is transmitted to the first signal converting module by the FPC; and is also configured to convert a high-frequency signal received from the first signal converting module via the FPC from a differential signal to a single-ended signal which is provided to the second antenna signal processing module; the second antenna signal processing module is configured to generate and receive a high-frequency signal; and the FPC is configured to transmit the differential signal between the upper slide portion and the lower slide portion. an auxiliary antenna is located in the upper slide portion while a main antenna is located in the lower slide portion; the upper slide portion further comprises a first signal converting module which communicates with the auxiliary antenna; and the lower slide portion further comprises a second signal converting module and a second antenna signal processing module which connects with the second signal converting module; wherein: the auxiliary antenna is configured to receive and transmit high-frequency signals; the first signal converting module is configured to convert a high-frequency signal received from the auxiliary antenna from a single-ended signal to a differential signal which is transmitted to the second signal converting module by the FPC; and is also configured to convert a high-frequency signal received from the second signal converting module via the FPC from a differential signal to a single-ended signal which is provided to the auxiliary antenna; the second signal converting module is configured to convert a high-frequency signal received from the second antenna signal processing module from a single-ended signal to a differential signal which is transmitted to the first signal converting module by the FPC; and is also configured to convert a high-frequency signal received from the first signal converting module via the FPC from a differential signal to a single-ended signal which is provided to the second antenna signal processing module; the second antenna signal processing module is configured to generate and receive a high-frequency signal; and the FPC is configured to transmit the differential signal between the upper slide portion and the lower slide portion. the auxiliary antenna is configured to receive and transmit high-frequency signals; the first signal converting module is configured to convert a high-frequency signal received from the auxiliary antenna from a single-ended signal to a differential signal which is transmitted to the second signal converting module by the FPC; and is also configured to convert a high-frequency signal received from the second signal converting module via the FPC from a differential signal to a single-ended signal which is provided to the auxiliary antenna; the second signal converting module is configured to convert a high-frequency signal received from the second antenna signal processing module from a single-ended signal to a differential signal which is transmitted to the first signal converting module by the FPC; and is also configured to convert a high-frequency signal received from the first signal converting module via the FPC from a differential signal to a single-ended signal which is provided to the second antenna signal processing module; the second antenna signal processing module is configured to generate and receive a high-frequency signal; and the FPC is configured to transmit the differential signal between the upper slide portion and the lower slide portion.