We collected the reproductive parameter of Yellow-rumped Flycatcher (Ficedula zanthopygia)in nest-box from 2005 to 2006 in a secondary forest in Zuojia Natural Reserve, Jilin Province. The clutch size of F.zanthopygia ranged from 5 to 7 eggs, average clutch size was 6.0 eggs (n=27), average egg weight was 1.6 g, average size of the eggs was 17.0 mm×13.1 mm (n=116). The incubation period of F.zanthopygia was 13.1 days, hatching success was 5.4 in every nest, nestling period lasted for 12.8 days, and fledging success was 5.3 in every nest. The nesting success of F.zanthopygia was 70.0%, the reproductive success of F.zanthopygia was 81.5%.