A slide rail bracket includes a main body and a slide component. The main body has an accommodating portion inside, and the front end of the main body is provided with two through holes. The slide component has a slide block and two positioning bolts. The slide block is slidably disposed in the accommodating portion, and the two positioning bolts are disposed on the front end of the slide block and respectively penetrate into the two through holes. The front ends of two positioning bolts respectively have a first diameter portion and a second diameter portion. The first diameter portion and the second diameter portion are arranged coaxial with each other, and the first diameter portion is disposed at the front end of the second diameter portion.