The invention provides a duckweed salvage machine on the water surface, comprising: a hull and wheels, the outer side of the hull is symmetrically rotated with wheels, and also includes: a fishing tray, a storage bin, a first motor, a first circular shaft, a first gear, The third connecting rod, the second connecting rod, the first connecting rod, the water spray device, the sixth gear, the limit plate and the column, the inner bottom wall of the hull is fixedly installed with a storage bin, and the outer side of the hull is fixedly installed with the first motor, and the output shaft of the first motor is fixedly connected to the sixth gear, the inner side of the hull is symmetrically rotated and installed with the first round shaft, and the first round shaft is fixedly connected to the first connecting rod, the water surface duckweed fishing machine provided by the present invention The motor is used to drive the hull to move, so that the duckweed enters the fishing tray, and the meshing connection between the gears drives the rotation of the fishing tray, thereby cleaning the duckweed on the water surface.