The utility model provides a desk suitable for mathematics field is used of novel structure, convenient to use, easily realization, the desk comprises a desktop. A breach has been seted up on the desktop, the open end of this breach sets up on the side of desktop, and be provided with a U -shaped spout on scarce two lateral walls of the intraoral left and right sides respectively, the notch of two U -shaped spouts sets up in opposite directions, still include the plate body that is equipped with the blackboard paint on it, two sides of plate body set up respectively in one of them U -shaped spout, just the plate body can slide in two U -shaped spouts, still include with the apron that gap shape corresponds, the apron set up in in the breach, just two sides of apron are pressed respectively in the upper end of one of them U -shaped spout, and via the U -shaped spout supports.