The present invention discloses a method of mobile terminal internal communications, which belongs to the field of mobile communications. The method comprises: a control signal channel is connected within an application processor module and a baseband processor module, and the control signal channel is composed of a first signal channel, a second signal channel and a feedback channel. A first request signal is sent from the application processor module to the baseband processor module via the first signal channel, and then a feedback is sent from the baseband processor module to the application processor module via the feedback channel. After the feedback is sent to the application processor module, the application processor module starts to send data to the baseband processor module. A second request signal is sent from the baseband processor module to the application processor module, and then the baseband processor module starts to send data to the application processor module.