Abstract: To improve the diagnosis and treatment of conventional osteosarcoma in China, we work out this consensus under the leader of Osteosarcoma Group of CSCO (Chinese Society Of Clinical Oncology) and Sarcoma Group of CACA (Chinese Anti-Cancer Association). This consensus is based on evidence-based medicine evidence with wide literature review and has been discussed and revised 5 times upon its final edition is released. This article mainly focuses on the interpretation and understanding of various aspects related to this consensus.