This thesis presents the test of the stereopsis of 148 hearing impaired students and 309 normal hearing students at age of 7 to 18 with domestic developed Digital Stereoscopic Test Charts. The result shows that normal hearing students have their stereopsis matured at the age of 10 to 12, while those hearing impaired students at 13 to 15, in other words, matured stereopsis coming to hearing impaired students gets slower than to the normal hearing ones; the stereopsis development level of both hearing impaired students and normal hearing students has no sex difference and increases with age; as they grow older, the percentages of stereopsis maturity of hearing impaired students show an increasing tendency and the gap between them is narrowed, as 16-18 years old, the students of both types have normal stereopsis level of 100%; poor eyesight is also an important factor in the development of stereopsis.