Desk with openable desktop

The utility model relates to a desk with an openable desktop. The desk comprises a desk body and a desk cover arranged above the desk body, wherein the desk cover is formed by two split desk plates; the first desk plate is connected with the top of the desk body through a sliding mechanism; the second desk plate is connected with the top of the desk body through a folded lifting mechanism; the sliding mechanism comprises two corresponding guide rails which arranged at the top of the desk body and two rollers which are arranged below the first desk plate; the rollers are in contact with the surface of the guide rails; the folded lifting mechanism comprises a first folding rod which is movably connected with one side of the desk body, a second folding rod of which one end is movably connected with the first folding rod and the other end is movably connected with the second desk plate, and a support rod which is movably connected with the second desk plate and is far away from the second folding rod; one end, far away from the end connected with the second desk plate, of the support rod is a free end. The opening methods of the first desk plate and the second desk plate of the desk are different; during opening, the occupied space methods of the first desk plate and the second desk plate are different; after opening, the light ray in the desk body is excellent, and the desk is convenient to use.