A portable explanation device disclosed by the present invention comprises a bookend, a base and a top plate, wherein the inner side of the base is provided with a roller, one side of the roller is provided with a guide groove, the top end of the base is provided with a support, the top end of the support is provided with a fixing rod, one side of the fixing rod is provided with a connecting rod, the top plate is installed above the fixing rod, square pipes are installed at the four corners of the top end of the top plate, a platform is installed at the top end of the telescopic barrel, a bookshelf is installed at the top end of the platform, a panel is installed at the top end of the bookshelf, rotating cylinders are installed at one end of the panel, limiting holes are formed in the inner sides of the rotating cylinders, and bolts are arranged on the inner sides of the limiting holes. By installing the bookend, the base and the top plate, forming the limiting holes in the inner sides of the rotating cylinders and arranging the plug pins on the inner sides of the limiting holes, the angle of manuscript paper can be adjusted, light adaptation is facilitated, and the efficiency is greatly improved.