Ash scraping device for building decoration

The utility model discloses an architectural decoration dust scraping device, which comprises a mounting plate, supporting legs are symmetrically arranged at the bottom of the mounting plate, a brake mechanism is arranged on the right side of the mounting plate, a moving plate is arranged at the output end of the brake mechanism, and sliding mechanisms are arranged on two sides of an inner cavity of the moving plate. A dust scraping mechanism is arranged at the output end of the sliding mechanism, a limiting mechanism is arranged on one side of the sliding mechanism located on the right side, a brake motor is adopted as an output center, a brake lead screw and a brake block are adopted as brake components, a movable plate and the dust scraping end in the movable plate are driven to move, and manual operation is well replaced; according to the inner row teeth of the dust scraping end, the practicability is greatly improved, the height of the dust scraping end can be driven to be adjusted in a sliding adjusting