The invention relates to a method for cultivating the bait of stichopus japonicus selenka in a costal sediment pond. The bait cultivation is carried out from April to May, which comprises that: (1) after the toxicity of the medicine for cleaning the pond fades away, the water in the pond is discharged; the water with the height being 30-50cm is injected again; and 0.075kg/m<2> of organic fertilizer and 0.003 kg/m<2> of chemical fertilizer are put in the pond; (2) when the depth of the inlet water in the pond reaches 80-90cm, demersal diatom is transplanted, 5-10l/mu of algae solution can be transplanted, and carbamide can be put in as per 0-1kg/mu; (3) Ruppia maritime and algae gammarid are transplanted. The Ruppia maritime is uprooted and transplanted integrally as per the quantity of 5-15 plants/m<2>; after the Ruppia maritime is transplanted, the algae gammarid is transplanted as per 1.5-3kg/mu. The beneficial effects of the invention are that not only the raised stichopus japonicus selenka has excellent quality, but also the incidence of diseases is low, the cultivation period is short, the survival rate is improved, therefore the method of the invention has vast promotion prospect.