This research aims to determine the effect of giving green tea leaf extract (Camellia sinensis) in egg yolk tris diluent to improve the quality of Bali bull semen in the cryopreservation process based on the values of motility, viability, and recovery rate of spermatozoa. The research was conducted at the Riau Province Livestock Artificial Insemination Unit in January 2023. Semen was collected …