The invention discloses a GPON uplink bandwidth management method; a group is established basing on a plurality of same or different T-CONTs of an ONU by setting four basic T-CONTs and the T-CONT group becomes the logical bandwidth management unit; the T-CONT group and T-CONTs in the group are all provided with SLA parameters to execute two-stage DBA scheduling; the T-CONT group logically integrates the service flows born by different T-CONTs to represent the capability of GPON of providing multi-services and all-round services for users; moreover, DBA can participate in the scheduling of different data alignments in the ONU, thus being conducive to keeping down the scheduling function of the internal alignments of the ONU and reducing the complexity of the DBA policy.