Modeling method for achieving alpine rhododendron ancient stump with flowers in multiple colors

The invention relates to a modeling method for achieving an alpine rhododendron ancient stump with flowers in multiple colors. The modeling method includes the following steps: A, wild alpine rhododendron ancient stump root system processing: scarifying and planing soil around an ancient stump root system, enabling the root to be exposed out, cleaning up the transplanted ancient stump root, spraying bactericide for sterilization, and carrying out local sterilization on truncated root wounds generated during transplanting digging, B, inarching alpine rhododendron plantlets with the seedling ages of 3-5 years and different color systems of red, yellow, purple, pink and white and in different varieties to the periphery of a same wild alpine rhododendron ancient stump in a surrounding mode, giving consideration to layered distribution of the different color system colors during inarching, and enabling root systems of the inarched plants to be in close contact with the ancient stump root system as far as possible,