A media storage device and a sectional image printing method are provided. The media storage device includes a main body, a sectional heating module and a pressing roller. The sectional heating module and the pressing roller are both disposed within the main body. The sectional heating module includes a body, a plurality of heaters and a power controller. The body is disposed within the main body, and the heaters are disposed on the body. The power controller includes a plurality of power circuits, and each of the power circuits is electrically connected with a corresponding one of the heaters to control the corresponding electrically connected heater to generate heat. The pressing roller is in contact with the heaters of the sectional heating module, and the heaters face the pressing roller. During a printing process, not all the heaters of the media storage device generate heat at the same time.