NOVELTY - Artificial suppression of Cladophora in sea cucumber aquaculture pond comprises filling water, feeding fermented chicken manure and Chlorella, testing water transparency, and changing water regularly; testing water transparency, and feeding fermented chicken manure and commercial effective microorganisms (EM) bacteria; gradually adding water to pond, testing water transparency, and feeding fermented chicken manure and Chlorella, testing transparency; and reducing water level while testing water transparency, feeding fermented chicken manure, and testing transparency.    USE - Method for artificial suppression of Cladophora in sea cucumber aquaculture pond (claimed).    ADVANTAGE - The method is a full-biological method, free of environment pollution, and harmless to aquaculture animals.    DETAILED DESCRIPTION - Artificial suppression of Cladophora in sea cucumber aquaculture pond comprises (A) filling water up to 50-70 cm water level, feeding 50-100 kg/acre fermented chicken manure for 3 days, stopping feeding, testing water transparency after 7-15 days until transparency is greater than 50 cm, continuously feeding 100 kg/acre fermented chicken manure for 1 day until transparency is less than 30 cm, and changing water regularly; (B) simultaneously feeding 200-1000 L/mu of 10 million/Halo liter Chlorella while feeding fermented chicken manure; (C) testing water transparency every 20 days after 5-6 months until transparency is greater than 40cm, and feeding 20-50 kg/acre fermented chicken manure; (D) feeding greater than 1 billion cells/ml commercial EM bacteria in 10 ppm/m3 water; (E) gradually adding water until pond water level is 100-150 cm, testing water transparency every 10 days until transparency is greater than 40 cm, feeding 10-50 kg/acre fermented chicken manure, testing water transparency after 3-5 days until transparency is less than 35 cm, stopping feeding until transparency changes, feeding 10-30 kg/acre fermented chicken manure, testing water transparency after 3-5 days, repeating steps until water transparency drops to 35 cm below, and simultaneously feeding 500-1000 L/acre Chlorella while feeding fermented chicken manure; and (F) reducing water level to 80-120 cm 2-3 times while testing water transparency every 10 days until transparency is greater than 50 cm, feeding 10-50 kg/acre fermented chicken manure, testing water transparency after 3-5 days, and continuously feeding 10-30 kg/acre fermented chicken manure when transparency changes until transparency is less than 40 cm.