A patent retrieval device includes a border, a dust plate, a back plate, a protective shell, a reinforcing plate, a heat dissipation grille, a telescopic bracket, a connecting plate, an anti-slip padand a suction foot, wherein the inner side of the border is provided with the back plate, the border is fixedly connected with the back plate, the front surface of the back plate is provided with thedust plate, the back plate is detachably connected with the dust plate, and the front surface of the dust plate is provided with a tempered film. A tempered film, the protective shell and the reinforcing plate are arranged on the original retrieval device to protect the device, so that the device is liable to damage when falling down or bearing external force; the telescopic bracket and the connecting plate are arranged on the original retrieval device, and the telescopic bracket and the connecting plate can be used to adjust a required angle for information search, so that the user does not need to take other tools again, thereby achieving the effect of convenient use.