Portable mobile digital signage device

The utility model provides a portable mobile digital signage device, which comprises a base, a shell and a tablet computer, a positioning groove is arranged on the base, the bottom of the shell is inserted into the positioning groove, a display window is arranged on the front side of the shell, the tablet computer is fixed inside the shell through a positioning component, and a display surface of the tablet computer is exposed out of the display window. A first opening and closing door is arranged on the back face of the shell, a first door lock is arranged on the first opening and closing door, the positioning assembly comprises four positioning sleeves arranged in the shell and fixed to the four corners of the display window respectively and elastic connecting bands connected to the positioning sleeves, and the positioning sleeves are used for wrapping the corners of the tablet personal computer. Wherein one connecting band is provided with a positioning column, and the rest connecting bands are provided wi