Abstract: Provided is an anti-peep screen, including a passive LCD module and a color LCD module stacked along a first direction; the passive LCD module includes a first electrode layer, a liquid crystal layer and a second electrode layer, the first electrode layer comprises a first sub-electrode, the second electrode layer comprises a second sub-electrode, and the first sub-electrode is opposite to the second sub-electrode and configured to input different voltages, so as to control a light transmission state of the passive LCD module. The anti-peep display screen of the present application solves the problems of poor display effect and single anti-peep function of existing anti-peep display screens by introducing a passive LCD module. Also provided is a vehicle-mounted display device and a vehicle.