The present application discloses a method and device for positioning. A first node receives first configuration information; receives a first candidate signal on a first candidate time-domain resource block; and transmits a first positioning reference signal; the first configuration information is used to indicate a first time-domain resource group, the first time-domain resource group comprising at least one time-domain resource block; a measurement result of the first candidate signal is greater than a first threshold; whether the first candidate time-domain resource block belongs to the first time-domain resource group is used to determine whether a transmitter of the first candidate signal is selected as a synchronization reference for the first positioning reference signal. This application helps enhance the positioning accuracy by addressing the synchronization of multiple SL PRS.