The invention discloses a device for supporting and fixing seedlings, which includes a support plate, the number of which is three, a housing is arranged on the top of the support plate, and a fixing plate is fixedly connected to the inner cavity of the housing , the top of the fixed plate is movably connected with a movable block, both sides of the top of the fixed plate are fixedly connected with spring plates, the top of the spring plate is fixedly connected with the top of the inner cavity of the housing, and both sides of the movable block are fixedly connected with springs, One end of the spring away from the movable block is fixedly connected with one side of the spring plate. In the present invention, by setting the support plate, the housing, the fixed plate, the movable block, the spring plate, the spring, the damping plate, the opening, the protective block, the connecting groove, the square plate and the first bolt, not only the seedlings can be It is well fixed, and can reduce the contact force between the seedlings and the protective block, effectively protecting the safety of the seedlings, improving the aesthetics of the seedlings, and promoting the healthy and safe growth of the seedlings.