The invention provides a ship berthing system. The ship berthing system comprises a bearing support, an installation seat, a connecting piece, a capturing portion and an adjusting portion; the bearing support is fixedly arranged on a ship; the installation seat is connected with the bearing support; the connecting piece is connected with the installation seat; the capturing portion is matched with the connecting piece to achieve berthing and fixedly arranged on a berthing object; the adjusting portion comprises a vertical adjusting portion body, the vertical adjusting portion body is arranged on the bearing support, is in driving connection with the installation seat and is used for driving the installation seat to vertically move along the bearing support and applying first resistance for stopping vertical movement during berthing. The ship berthing system is stable in mooring.