The invention discloses a method for fertilizing colored leaf plants. The method includes the following steps: 1) applying an organic fertilizer, a bacterial fertilizer and a high nitrogenous compoundfertilizer in March during base fertilizer application in spring in parts by weight o 10-20 parts, 0.1-0.25 part and 0.5-1 part respectively; 2) conduct summer topdressing in June to July and topdressing 0.5-1.5 parts of a high-nitrogen high compound fertilizer; 3) conducting autumn topdressing in September to October and topdressing 0.5-1.5 parts of a high phosphorus compound fertilizer; completing the fertilization operation of colored leaf plants for one year through the above steps. According to the method for fertilizing the colored leaf plants, the utilization efficiency of the fertilizer by the plants can be improved, the discoloration period of the colored leaf plants is advanced, the leaf hanging time is prolonged, and the ornamental value of the colored leaf plants is improved.