At present,the project of new domestic zirconium alloy fuel sub-assembly irradiation is ongoing according to schedule.This paper presents progress of the project such as fuel sub-assembly detailed design,manufacturing process and fuel transportation method.1 Fuel sub-assembly detailed designing At present, the project of new domestic zirconium alloy fuel sub-assembly irradiation is ongoing under schedule. This paper presents progress of the project such as fuel sub-assembly detailed design, manufacturing process and fuel transportation method.1 Fuel sub-assembly detailed designing