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A visualization modeling method of leaf vein was presented, including the geometric modeling for plant leaf and shape modeling for leaf vein. The geometric model for leaf was built through changing rectangle shape. Different methods were tested for the shape modeling for leaf vein. The feather vein was formed by nonlinearity function. The mushy vein was formed by random iteration based on seed growing. The palmate vein was formed based on leaf growing. These methods could be realized quickly and easily.