Time synchronization method and system

The invention discloses a time synchronization method and system. The method comprises the steps that a topological structure of a plurality of to-be-synchronized components based on wireless communication connection is acquired, a reference synchronization component in the to-be-synchronized components is determined, and the to-be-synchronized components are arranged at the distribution network end of a target power system; according to the topological structure, transmission parameters between the to-be-synchronized components are determined, and the transmission parameters comprise the number of input ports, the number of output ports and the number of links between every two to-be-synchronized components; and when it is determined that the transmission parameters meet the preset transmission conditions, performing time synchronization on the plurality of to-be-synchronized components according to the topological structure and the reference synchronization component. The problem of low time synchronization