Device and method for automatically separating algae from water

The invention provides an automatic algae-water separation device and a use method thereof, and belongs to the technical field of water surface cleaning automation, and the device comprises a water body treatment ship, a traction ship, a flexible fence, a power generator, a drum-type filter and an electric control cabinet; the two sides of the front end of the water treatment ship are connected with the two flexible fences respectively, and the other ends of the two flexible fences are connected with the traction ships respectively. A collecting water tank for accommodating algae mixed liquid is arranged at the front part of the water treatment ship and between the two flexible fences, and two metal blocking nets are vertically arranged in the collecting water tank; a generator, a drum-type filter and an electric control cabinet are sequentially arranged on the water treatment ship from front to back and are electrically connected with one another; according to the invention, a pure physical filtering method