A three-dimensional fender comprises limit blocks, slide rails, sliders, inner dampers, a plurality of strengthening pipes, grooves, screw barrels, screws, two bearings and a damper. The strengtheningpipes are mounted in left and right sides of the damper, the grooves are arranged in left and right sides of the damper, the slide rails are mounted in the corresponding grooves, the sliders are mounted on the corresponding slide rails, the limit blocks are mounted at upper ends of the corresponding slide rails, the inner dampers are arranged on side faces of the corresponding sliders, lower endsof the inner dampers extend out of the corresponding grooves, and the bearings are mounted on side faces of the corresponding inner dampers. The three-dimensional fender has the advantage that the side face of the fender can be adjusted in length.