The invention discloses a solar power generation device for an unmanned ship with easy installation. The solar power generation device comprises a base, wherein the upper surface of the base is provided with an electric telescopic rod, and the upper end of the electric telescopic rod is fixedly connected with a supporting rod, the outer side wall of the supporting rod is provided with sliding chutes, the outer surface of the support rod is sleeved with a connecting sleeve rod, the inner side wall of the connecting sleeve rod is movably connected with pulleys, the outer side wall of the connecting sleeve rod is uniformly provided with a plurality of threaded holes, the outer wall of the front end of the connecting sleeve rod is rotatably connected with connecting rods, one side, close to the sliding chutes, of the outer side wall of the supporting rod is fixedly connected with fixed crossbars, one side, away from the supporting rod, of the outer side walls of the fixed crossbars are connected with mounting plates via hinges, and the bottom of the inner walls of the mounting plates are provided with groove bayonets. The solar power generation device is easier to install and disassemble, operation is simple, design is reasonable, light receiving area is increased, volume is relatively small, space area is small and power generation effect is better.