The invention relates to the technical field of screen detection, and in particular to a screen detecting device. The device includes a support platform, a support base disposed on the support platform, a carrying seat disposed on the support base, an illumination mechanism, a probe assemblyand an information collection mechanism; the illuminating mechanism is located under the carrying seat, andthe illuminating mechanism is disposed on the support platform; the probe assembly is located above the carrying seat, the probe assembly is movable up and down, the probe assembly comprises a cantilever probe carrier plate and cantilever probes, and each cantilever probe is disposed at the cantilever probe carrier plate; the information collection mechanism is located above the carrying seat, andthe information collection mechanism can collect information on a screen. The cantilever probes on the cantilever probe carrier plate are in contact with the screen on the carrying seat, and abuts ona detection point on the screen, the two cantilever probes are turned on, the illumination mechanism emits laser light on the screen,the information collection mechanism collects light passing through the screen, and image information is analyzed to determine the uniformity and stability of screen imaging.