This stems from a lawsuit against Arpaio, which challenges the cases of immigrants arrested in workplace raids for using fake or stolen ID's to get jobs.
Immigrant's rights advocates claim the state ID theft laws are trumped by federal law.
"I can't even begin to describe how many people I've had in my office suffering, crying that their family members have just been arrested. This injunctions going to mean that suffering, that separation is gonna stop, that those hateful actions are not gonna occur," said Ray Ybarra Maldonado.
This decision comes just a few weeks after Arpaio voluntarily disbanded his controversial squad that conducted the workplace raids.