Automatic conversion method for ocean survey ocean sediment type data

The invention relates to an automatic conversion method for ocean survey ocean sediment type data. The method is mainly technically characterized by comprising the following steps: directly converting primary naming of classic sediment data classification into primary naming of ocean graph type granularity classification; directly converting rock blocks, coarse gravels, medium gravels, extremely coarse sands, coarse sands, medium sands, fine sands, extremely fine sands, coarse silt, medium silt, fine silt, extremely fine silt and fine clay in secondary names of classic substrate data classification into secondary names of sea chart type granularity classification; classified conversion of fine gravel and coarse clay in secondary naming of classic sediment data classification is processed according to the size fraction range or phi value interval of original data. The method is reasonable in design, the function of automatically converting classic granularity classification data and sea chart type granularity