The invention relates to a soap embedded plant section method which adopts soap as embedding material, and overcomes the defects that the traditional paraffin section method is slow in speed, complicated in operation, large in cell deformation, expensive in expense, hard in obtaining a thin slice by hands, harmful for human health due to dimethylbenzene, and the like. The method has the advantages of short manufacturing period generally needing about five hours, fewer steps for the treatment of herbarium, small deformation of section preparation cells, low cost in manufacture of the slice, no hurt for the body of an experimenter, no environmental pollution, etc.