The invention belongs to the field of shipbuilding and discloses a method for installing a static ring end friction ring of a water-lubricated forward and backward seal device of a refrigerated ship.The method relates to a tool plate of a tooling. The tool plate of the tooling consists of a main board, a connecting plate arranged at a section of the main board and a pressing plate arranged at theother end of the main board. The length of the main board is matched with the horizontal length of the compressed elastic compensator. Includes such steps as assembling static ring, elastic compensating body, friction ring at static ring end and rigid pressure ring at both ends of elastic compensating body to stern shaft, and keeping elastic compensating body in relaxed state; 2, uniformly mountat least three tool plates of that same size on the static re in an annular array; In step 2, firstly, the connecting plate is connected with the side of the static ring through bolts, and the plate surface of the pressing plate is in extrusion contact with the rigid pressing ring which is far away from the static ring; Then, the bolts of each tool plate are uniformly and alternately tightened sothat the elastic compensation body is slowly compressed until the elastic compensation body is compressed to a preset horizontal length. The method can ensure the flatness of the friction ring at thestatic ring end with high precision and low requirement on the operation skills of the personnel.