This paper studied 《Lady white is putted down forever under the Leifeng pagoda》 written by FengMonglong in the Ming dynasty, especially focusing on the symbol of the characters. The important characters of this piece are a lady white, who is originally a monster white serpent, a young man XuXuan and a Zen master Fahai. If perusing this work, we can know that these characters symbolize the mind: the Lady white is a symbol of the id, the young man XuXuan is of the ego, and the Zen master Fahai is of the superego. According to Freud"s theory, Human personality is made up the id, the ego and the superego. The id is a instinctive energy and a storing place of libido. This follows "Pleasure Principle" pursuing only the pleasure but evading the unpleasantness. The ego is something of a result appearing above the surface when the id only chases after Pleasure principle. The superego is related with the sociality and the ideal in the individual spirit, and is a realm of personality"s social value, the conscience and the ideal in the Human personality of Psychoanalysis. Because the ego always exists between the id and the superego. And only the ego can manage the practical adaptation that normal life makes a demand about the outside, so it is situated in a weak and an uneasy position. The young man XuXuan in the novel is described as a weak man. He is always under the control of the Lady white, also to free himself from the Lady white, he asks the Zen master Fahai for help after all. XuXuan"s character shows that the ego is affected by the id and the superego. The lady white is a symbol of the id. She has a hold XuXuan and makes him pursued the pleasure, on the other hand she is into collision with the Zen master Fahai who is a symbol of the superego. As a result, the important characters of the piece of 《Lady white》 are a symbol of Human personality: the id, the ego and the superego. Just as the mythology represents the human life"s meaning and the human mind, also the main characters of this novel represent the relation between the id and the ego, the relation between the ego and the superego, the relation between the id and the superego through the symbolism.