The invention discloses a water-surface floating material salvaging device based on a carbon fiber unmanned boat and relates to the technical field of unmanned boats. The water-surface floating material salvaging device comprises a carbon fiber boat body; the upper part of the left side surface of the carbon fiber boat body is fixedly connected with a fixing plate; a suspending mechanism is installed inside the carbon fiber boat body; a propelling mechanism is installed at the right side of the carbon fiber boat body; and a lifting mechanism is installed below the fixing plate. The water-surface floating material salvaging device based on the carbon fiber unmanned boat realizes an effect that water is leaked out of a groove and a storage box, prevents the water from occupying the space ofa fourth cavity, has a function of storing floating materials, has the advantage of realizing convenience salvaging, realizes an effect that a first forward and reverse rotating motor is used for driving a salvaging box to move up and down, has the function of making the salvaging box sink below the floating materials and move upwards to collect the floating materials, has the advantage of automatically salvaging the floating materials, does not need manpower to salvage the floating materials, and saves lots of labor.