Process for preparing water bloom blue-green algae harvest on lake

The present invention discloses a method for preparing a lake cyanobacterial harvested, comprises the following steps: A, fences; B filtration, washed with non-blocking pump in the fence harvested algal blooms of algae set suction grooves inclined sieve gravity;. C. dehydration, the slurry was filtered algae harvested by centrifugation, vibration sedimentation, or algae mud dehydration;. D drying, sampling dryer, plastic greenhouses hanging drying, or dried or air-dried sheet algal alginate alginic block; with E. the harvested algal sheet mill or alginic block pulverized into algal flour. The method of the present invention is easy, simple, energy saving, algae powder can be used as feed and fertilizers can also be used as a raw material to extract fine chemical products.