The structure of konjac, konjac-graft-acrylic acid (AA), and regenerant of graft were studied with scanning electron microscope(SEM). The effect of grafting, regenerating and urea loading on konjac structure were discussed. The results showed that the konjac’s piece structure were transformed into grafter’s dense network structure by grafting, the grafter’s dense network structure was transformed into regenerant’s tussocky structure by regeneration, and the grafter’s structure was transformed into thick network by urea loading and the urea was filled in the hole. The urea absorbility of grafter was not influenced by the concentration of urea solution. The urea content of the swollen gel showed a linear relationship with the concentration of urea solution (R2=09998).