Environment-friendly building decorative plate structure

The environment-friendly building decorative plate structure comprises a wall body and a heat preservation plate connected to the wall body through a connecting assembly, the connecting assembly comprises a hollow sleeve, the two ends of the sleeve are open, and a limiting assembly is arranged in the sleeve; the limiting assembly comprises a limiting column arranged in the diameter direction of the sleeve, an extrusion unit is arranged at the bottom of the limiting column, and the limiting column is extruded outwards in the diameter direction of the sleeve through the extrusion unit so that the limiting column can be inserted into the wall face. The extrusion unit is arranged at the bottom of the limiting column, and when the wall is loose due to moisture, the limiting column is extruded outwards in the diameter direction of the sleeve through the extrusion unit, so that the limiting column is inserted into the wall, and connection between the sleeve and the wall is reinforced; and the phenomenon that the ins