The invention discloses an angle adjusting device for an information platform. A main information platform body is involved, a fixing base is arranged under the main information platform body, two elastic retractable devices are connected between the fixing base and the main information platform body, and each elastic retractable device comprises a retractable support rod, a spring and a fixing lug; one end of each retractable support rod is movably connected to the corresponding side surface, close to the fixing base, of the main information platform body, the other ends of the retractable support rods are movably connected to the two sides of the fixing base, a semi-circular arc-shaped adjusting plate is fixedly installed on the side surface, close to the main information platform body,of the fixing base, and a locating cavity is fixedly formed in the side surface, close to the fixing base, of the main information platform body. According to the angle adjusting device, through the arrangement of the arc-shaped adjusting plate and the cooperation of an adjusting tooth groove, a gear is rotated according to the direction of the adjusting tooth groove, so that the angle of the maininformation platform body is changed and conveniently adjusted by a user according to demands, and therefore the information platform is more convenient to use.