The invention discloses an unmanned ship engine carbon fiber housing with a protective function, and relates to the technical field of unmanned ships, which includes a fixing box, the engine is fixedly connected with the inner bottom wall of the fixing box, The bottom surface of the fixing box is fixedly connected with two oppositely symmetrical cushioning mechanisms, the upper surface of the fixing box is provided with two oppositely symmetrical grooves, a support plate is arranged inside each groove, a cover shell body is arranged above the fixing box, and the upper surfaces of the two support plates are fixedly connected with the bottom surface of the cover shell body. The carbon fiber enclosure of the engine of the unmanned ship with the protection function, under the action of the second spring, The invention can absorb the impact force of the casing body through the compression deformation of the second spring, effectively protect the engine and the casing body from damage, and under the action of the first spring, not only can the temperature of the engine be reduced, but also the engine can be effectively sealed, and other substances can be prevented from entering the engine interior.