Inverted large-displacement support with dustproof function

The utility model discloses an inverted large-displacement support with a dustproof function. The inverted large-displacement support comprises a support body, a horizontal cover plate and a vertical cover plate. The horizontal cover plate and the vertical cover plate are arranged on the outer side of the support body in a surrounding mode in the horizontal direction and the vertical direction to form a sealing dustproof cover, external dust and gravel are effectively prevented from entering the support, and the dustproof effect of the inverted large-displacement support is guaranteed. Furthermore, the horizontal cover plate is arranged at the top of the vertical cover plate in a sliding mode, redundant design is adopted, an edge is reserved on the outer side of the contact portion of the horizontal cover plate and the vertical cover plate, and the length of the edge is larger than the sliding displacement distance of the support, so that when the support moves, the interior of the dustproof cover is still in