Vertical frame with adjustable triangular elevation surface formed by upper and lower frames and H-shaped clamping member

The invention discloses a vertical frame with adjustable triangular elevation surface formed by upper and lower frames and an H-shaped clamping member, which comprises a support frame, a bottom framematch with that support frame, and H-shaped clamping part. The middle part of the support frame is provided with a book corrugation placing groove, the upper part of the support frame is provide witha book page fixing part, and the bottom part of the support frame is located in the bottom frame and is axially connected with the bottom frame. A plurality of sets of first clamping holes corresponding to each other are arranged on the two sides of the bottom frame, The two ends of the bottom of the H-shaped clamping member correspond to a set of first clamping holes, a plurality of sets of second clamping holes correspond to each other are arranged on the two sides of the support frame, the two ends of the top of the H-shaped clamping member correspond to a set of second clamping holes, andthe H-shaped clamping membe