The invention belongs to the technical field of marine garbage cleaning, and particularly relates to an automatic cleaning ship for marine floating garbage. The automatic cleaning ship comprises a ship body, a garbage collecting roller, a first rotating shaft, a collecting and filtering net, a
turbine, a worm shaft, a supporting seat, a double-head motor, a universal transmission shaft, a second rotating shaft, a first belt wheel, a first belt and a
propeller. According to the automatic cleaning ship, the double-head motor drives the universal transmission shaft to rotate, then the second rotating shaft is driven to rotate, and further the
propeller is driven to rotate, so that the garbage cleaning ship is pushed to move on the sea surface; meanwhile, the double-head motor drives the wormshaft to rotate, the
turbine is in meshing transmission with the worm shaft, then the first rotating shaft is driven to rotate, and further the garbage collecting roller is driven to rotate; and meanwhile, a cylindrical rod rotates, the garbage floating on the sea surface is fished up by the rotating cylindrical rod and rotates along with the cylindrical rod, and when the cylindrical rod rotates over the highest point, the garbage slides down along the cylindrical rod and enters the collecting and filtering net in a garbage storage cavity, and the garbage floating on the sea surface is cleanedaccordingly.