Multi-function printer with pivotal flip guide mechanism

The invention relates to a multi-function printer with a pivotal flip guide mechanism. The multi-function printer comprises a feeding mechanism; first to third channels; the image processing unit is located on the first channel, the first face of the media is conveyed to the second channel by the feeding mechanism after being subjected to first image processing by the image processing unit, and the feeding mechanism locally feeds the media subjected to the first image processing out of the second channel and then feeds the media back into the second channel to enter the third channel; the media enter the first channel from the third channel, so that the second side of the media is subjected to second image processing by the image processing unit; and the guide assembly is rotatably arranged at the communication part of the third channel, the second channel and the first channel, and maintains a forward path from the normally closed first channel to the second channel and a reverse path from the normally open