Abstract: To explore the silkworm breeding performance of‘Luyou 2’and‘Luyou 3’mulberry varieties in Ankang of Shaanxi, with the control of‘Hushan No.32’, the mulberry leaves were used for whole age feeding of 873×874 hybrids and their parents 873 and 874, the total cocoon volume, cocoon layer and cocoon layer rate of the hybrid and the spawning condition of the parents were measured. The results showed that compared with the control, there was no difference in the developmental process and the cocoon layer rate by feeding with ‘Luyou 2’,‘Luyou 3’mulberry leaves, but the total cocoon volume and the cocoon layer rate were significantly higher, and there was no difference in the good egg rate of the tested and the control mulberry varieties.