As Chang'an Culture does not have its prominent position in the Chinese main cultural school, the paper, directed against this, studies the culture and its definition, points out its developing stages, sorts out its subjective basis and objective conditions, and summarize its 5 characteristics. The analysis indicates that Chang'an Culture is one of the important parts of the Chinese culture and is the re-presentative of inland civilization. Therefore, it is necessary to conduct further research on its interior values and carry forward it on a large scale.