IEC 61970 has been classified as one of smart grid core standards by many international standards organizations and countries. In this paper, the latest development status of standard IEC 61970 is overviewed. Then the added names model, diagram layout model, greater change in the transformer model and measurement model in IEC 61970 CIM are introduced. Finally, the CIS and graphics code changes in IEC 61970 standard are described in this paper.