The invention discloses a book support frame. The book support frame comprises a face plate assembly and a support frame assembly. The face plate assembly comprises a face plate and at least one clamping piece. The support frame assembly comprises a support, a support cover plate, a gear rod, an elastic body, an elastic body fixing part and shaft pins. The support frame assembly is fixed on the back of the face plate through the support cover plate; and the support and the support cover plate are pivoted through the gear rod and the shaft pins. The elastic body is mounted between the support cover plate and the gear rod through the elastic body fixing part; and relative pivotal motion between the support and the support cover plate can be blocked or deblocked by operating the gear rod. According to the book support frame capable of setting support angles conveniently and reliably, a plurality of support angles can be freely set on the book support frame, and the setting positions are firmly locked, so that the condition that the support collapses cannot occur.