Disclosed are a mobile terminal and a communication processing method therefor. The mobile terminal comprises: a housing adopting a metal material and comprising a top housing, a middle housing and a bottom housing, wherein a gap is arranged between the top housing and the middle housing and between the middle housing and the bottom housing; a MIMO antenna is arranged in an accommodating space of the housing; a grounding port and a feeding port corresponding to the MIMO antenna are correspondingly arranged in the accommodating space; a matching circuit corresponding to the grounding port and a matching circuit corresponding to the feeding port are also arranged in the accommodating space of the housing; a controller and a wireless communication unit are also arranged in the accommodating space; and the controller is configured to control the states of the grounding port and the feeding port, adjust the matching circuit corresponding to the controlled grounding port and the matching circuit corresponding to the feeding port, and control the wireless communication unit to conduct communications at different frequency bands via a corresponding antenna. The embodiments of the present invention achieve communications of a plurality of types of antennas of an all-metal mobile terminal.