The present invention discloses a backlight frame, a backlight structure and an LCD display device, the backlight frame comprises: a frame body and a plurality of limiting structures disposed outside the frame body, one end of the limiting structure is connected to the frame body detachably, the other end of the limiting structure is provided with a limiting portion, a limiting face of the limiting portion and a side surface of the frame body are coplanar, and the limiting face of the limiting portion is disposed above the side surface of the frame body. By detachably disposing limiting structure on frame body of backlight frame and limiting display element formed on frame body with limiting structure when assembling, contraposition installation can be achieved accurately, operator operation can be facilitated. Limiting structure is disposed detachably, thereby width of frame body is not increased, and it satisfies narrow bezel design requirement.