Abstract:The Xiaoling tuyang (the architectural design of the Xiao Mausoleum) is a gigantic drawing with a length of 11 meters that was created during the construction of the mausoleum in the early Qing dynasty. Since it reflects institutional rules and historically sensitive facts, this drawing had been hidden in the imperial archives for a long time before its moving into the First Historical Archives of China. In 2000, the author received a color photograph of the drawing, and in 2004, the author got a chance to see the original copy with many more details. This made it possible to conduct a special in-depth research about it. Based on such a study, it can be confirmed that this drawing was completed at the beginning of the ninth reign year of emperor Kangxi. In order to promote future research, this paper introduces the study findings and interprets their significance. In more detail, Part 1 discusses the scientific discoveries and breakthroughs, doubts and truths, as well as its overall configurations, while Part 2 explores the issues of pattern, inheritance, influence, and value. In short, the author intends to sum up and share some research findings in order to receive further valuable suggestions and advice.