Dreams are just a kind of psychological activity when people are asleep. The psychological activity in dreams, like the psychological activity when people are awake, is a reflection of objective things in the human brain. The bizarre dream in the dream is the illusion of stimulating various objective things when people are unconscious during sleep. For example, when people are awake and tachycardia, it seems that the palpitation feeling of being chased becomes a bizarre nightmare of being chased, and when people are awake and bradycardia or premature, the palpitation feeling becomes a bizarre nightmare of being hung and falling. In dreams, we often feel slight physiological symptoms that some people can't easily feel when they are awake, which is caused by the fact that the stimulation of external objective things is relatively small, while the stimulation of internal objective things is relatively strong. In Gneki's view, the operation and makeup of dreams completely distort the manifestation of dreams through the process of compression, feature displacement and secondary correction. Compression refers to the transformation of dreams with manifestations into simple forms, in which some components of dreams are omitted and others only appear in incomplete forms. Displacement means that an unimportant idea becomes a trivial matter, while a dream becomes a major event or occupies an important position. Symbolism means replacing abstract desires with concrete forms. It shows that dreams are the real path to the subconscious; The contents that can be formed (changes, contradictions, reasons) reflect the logical relationship, but appear in a brand-new way. The second correction is to systematize the disordered materials in the dream to cover up the truth.