The Generic Compatible Combo XGSPON OLT optical module is inserted on the single board of the Generic Combo XGSPON OLT device, which can provide users with a symmetrical bandwidth with a maximum uplink and downlink rate of 10G. The Combo XGSPON OLT optical module integrates the functions of XG(S) PON OLT and GPON OLT optical modules, and can deploy different network rates in an ODN network according to the requirements of the ONU side, realizing a smooth upgrade from GPON to XGSPON. It avoids external WDM equipment in the network, and reduces the cost of network construction and maintenance.