Abstract: Deep dyslexia is a specific reading disorder. This type of dyslexia provides evidence for the existence of semantic route in oral reading. Deep dyslexia is not very common in English speakers while it has a high occurrence in Chinese speakers. It may indicate that the mechanism of reading is between Chinese and English language. This paper introduces the performance of deep dyslexia, and compares the research results of deep dyslexia between in Chinese and in English. Cognitive neuropsychological rehabilitation of deep dyslexia is also discussed

Key words: deep dyslexia, cognitive mechanism, cognitive neuropsychological rehabilitation