The present invention discloses a portable pencil bag. SOLUTION: A main shell is included, and a cover plate is engaged with and attached to a top end surface of the main shell by a hinge, whereby a mouth closing plate is inserted into a mouth closing slide groove, and a closing buckle and a closing buckle shell. And fit to close the mouth of the brush bag, press the release button, the release button presses the closing buckle, the closing buckle and the closing buckle shell separate, take the closing plate from the closing slide groove And the brush bag is opened, the present invention installs separate parts in the brush bag, puts each type of brush or stationery in each part, and arranges them neatly so that each part in the brush bag is After opened, the space of each part of the pencil bag is expanded and convenient to take, while the internal reversal design meets the occasional needs of the user. [Selection diagram] Figure 1
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