The invention provides a teaching demonstration device, which comprises a storage frame, adjustable lifting frame structures, labor-saving moving frame structures, longitudinal limiting frames, a lifting display frame structure, a side edge positioning insertion pipe, a convex block, a movable cover plate, an inverted U-shaped frame, an automatic limiting frame structure, a storage frame, a display screen, a side edge insertion frame, a writing board, a rubber cushion block, a storage battery and a control button. The adjustable lifting frame structures are installed at the four corners of thelower portion of the storage frame; the labor-saving moving frame structures are mounted below the adjustable lifting frame structures; the longitudinal limiting frames are installed on the left sideand the right side of the inner wall of the storage frame through screws. Stretching air cylinders are inserted into the left side and the right side of the bottom of the storage frame, meanwhile, the upper portions of the stretching air cylinders are in bolted connection with a connecting plate, the stretching air cylinders can be conveniently used for driving the display frame to flexibly ascend and descend according to needs during use, and display objects in the display frame are conveniently displayed.