Hydraulic filling sea mud culture substrate

The invention provides a hydraulic filling sea mud culture substrate, which relates to a culture substrate. The hydraulic filling sea mud culture substrate comprises the following components in parts by weight: 1 part of desalinated hydraulic filling sea mud compound substrate, 0.02-0.04 part of superphosphate, 0.044-0.091 part of organic fertilizer and 0.159-0.2 part of sludge, wherein the desalinated hydraulic filling sea mud compound substrate is an improved substrate which is formed by adding carbide slag and coarse texture materials into hydraulic filling sea mud to perform desalinating,and the volume parts ratio of the hydraulic filling sea mud, the carbide slag and the coarse texture materials is 0.5-0.65:0.01-0.5:0.25-0.5. Compared with the desalinated hydraulic filling sea mud compound substrate, the hydraulic filling sea mud culture substrate has the advantages of greatly improved physicochemical property, lowered pH value, addition of microaggregate and enhanced fertility,and can be applied to afforestation of more floristics and larger areas. By developing and taking the sludge as the main fertilizer, the invention opens up a new way to handle and utilize the sludge.