Portable file support with reconfigurable space

The utility model provides a portable file support with a reconfigurable space. After the main frame is placed on an office table, the left half cover and the right half cover are opened; taking out the back plate, the side coamings and the middle plate; before the side coaming is installed, after the locking button is pressed down, the operation is kept; the upper rack drives the lower rack to move through the transmission gear; in the process, the front deflector rod and the rear deflector rod move at the same time; the bolt moves inwards and compresses the reset spring; then, the half-moon-shaped bosses on the side coamings are embedded into the half-moon-shaped grooves of the left half cover and the right half cover; and then the locking button is loosened to fix the side coaming, thenthe middle plate is installed, the back plate is hinged to the middle plate through the fixed positioning pin, and the back plate is hinged to the side coaming and the main frame through the movablepositioning pin, so that i