To improve the operational efficiency of the digital government, this paper firstly expounds the relevant cases of digital government data sharing in Guangdong-Hong Kong-Macao Greater Bay area in digital government. Then it explores the basic pro‐ cess and effect of multi department data sharing in Guangdong-Hong Kong-Macao Greater Bay area, and points out that there are still many problems in multi department data sharing at present. It discusses the coordination strategies of multi department data shar‐ ing in the development of digital government, mainly in five aspects: further improving relevant laws and regulations, building a comprehensive supporting management system, refining the department performance evaluation index system, optimizing the inter‐ est coordination and incentive mechanism, and forming a multi-party supervision and inspection operation force.