Network access method and apparatus of ONU

The invention provides a network access method and apparatus of an optical network unit (ONU). The method comprises: a network access notification message of an ONU is received at an optical line terminal (OLT); and according to a pre-configured ONU network access rule, an ONU network access configuration parameter is obtained and is sent to an EMS, wherein the ONU network access configuration parameter serves as a basis of controlling ONU registration to the OLT by the EMS. Therefore, problems of low network access and service fulfillment efficiencies of the newly-installed ONU according to the correlation technique can be solved; and thus automatic completion of network access and service fulfillment configuration of the newly-installed ONU can be completed.