The invention provides a ship braking energy feedback and utilizing system. The ship braking energy feedback and utilizing system comprises a ship motor, a rectifier, a first protection switch, a relay, a second protection switch, a farad capacitor, a vanadium redox battery device, a tidal power generation mechanism, a third protection switch, a controller and a charging switch. The relay is connected with the first protection switch through an electric wire. The first protection switch is connected with the rectifier through an electric wire. The rectifier is connected with the ship motor through an electric wire. The vanadium redox battery device is connected with the farad capacitor through an electric wire. The charging switch is connected with the controller through an electric wire. The controller and the third protection switch are connected through an electric wire. The third protection switch is connected with the tidal power generation mechanism through an electric wire. The charging switch and the relay are connected through an electric wire. The farad capacitor is connected with the relay and the second protection switch through electric wires. According to the ship braking energy feedback and utilizing system, using is convenient, operation is facilitated, the using efficiency of energy resources for electric propulsion of a ship is improved, the cruising ability of the ship is improved, the energy resources are saved, and the reliability is high.