A physical object multi-dimensional observation-based explainable poster display frame (2) and a usage method therefor, which relate to the technical field of display frames. When an article is being displayed, by means of dimming glass (9) being in a transparent state when energized, a visitor may conveniently and clearly observe an electric push rod (6); by decomposing hydrogen peroxide into water and oxygen, a rubber bag (15) expands, thereby accelerating mercury expansion within a square rubber frame (11), such that light is reflected; in addition, the projection effect during data explanation is enhanced, such that the visitor may observe more clearly. When the displayed article is being explained, by means of a sliding block (18) and cleaning block (19) sliding up and down, the cleaning block (19) cleans dust on a surface of the dimming glass (9). When an explainer writes on the dimming glass (9) by using a whiteboard marker (26), light is absorbed by means of black ink, such that the local temperature is higher; and a signal is transmitted to a controller (29) by means of a temperature sensor (24), such that the dimming glass (9) is de-energized and the written text may be clearer.
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