The invention discloses an automatic clearing ship for rubbish on water and belongs to the technical field of cleaning the rubbish on the water. The ship comprises a ship body, a rubbish collection system and a rubbish transport system, wherein the rubbish collection system comprises a rubbish storage bin, a chain shaft, guide arms, an arresting barrier, chains and a collection basket; the rubbish transport system comprises a guide rail transmission stand and a lifting stand; the guide rail transmission stand consists of transverse guide rails and longitudinal guide rails by crossing; and the lifting stand comprises a hook, a sleeve, diagonal rods, a base, a vertical rod, a cross rod, a motor and a screw rod. The ship body is simple in structure, so that the structure of the complete ship is simplified on the basis of function addition, the operation cost and manufacturing cost are lowered greatly, the energy consumption is reduced correspondingly, the popularization and use of the clearing ship are facilitated, and the automatic clearing of the rubbish on the water can be achieved.