Data synchronization method, system and device supporting breakpoint resume and storage medium

The invention relates to a data synchronization method, system and device supporting breakpoint resume, and a storage medium. According to the technical scheme, the method comprises the following steps: obtaining log file data of a source database; establishing a table according to the log file data; writing corresponding data nodes in the data of the table according to the data characteristics of the data in the table; transmitting the data written with the data nodes to the target database, judging whether information of receiving the data nodes fed back by the target database is received or not under the condition that the data nodes are transmitted in the process of transmitting the data written with the data nodes to the target database, and transmitting the data to the target database under the condition that the information fed back by the target database is received. Storing the position information of the data node and the corresponding storage time; the data synchronization method and device have th