Pillar and beam connecting and fixing piece

The utility model discloses a pillar and beam connecting and fixing piece. The pillar and beam connecting and fixing piece comprises an anti-rotation sliding part and a clamping part, wherein the anti-rotation sliding part comprises a cylindrical sliding block matched with a connecting pillar channel, and an anti-rotation clamping block which is formed on the side part of the sliding block and is matched with a channel opening; the anti-rotation sliding part can enable the pillar and beam connecting and fixing piece to vertically slide in the channel of a connecting pillar and is matched with the channel opening to prevent the pillar and beam connecting and fixing piece from rotating; the clamping part is formed under the bottom surface of the anti-rotation sliding part, and the horizontal section of the clamping part is smaller than the bottom surface of the anti-rotation sliding part; the clamping part comprises two baffle blocks which are distributed in a diagonal manner and of which two horizontal sections are triangular or approximately triangular; the two baffle blocks can be matched with the inner wall of the channel to fix clamping hooks of the connecting pillar.