Porous brick for reactor of propane dehydrogenation device and preparation method of porous brick

The invention discloses a porous brick for a reactor of a propane dehydrogenation device and a preparation method of the porous brick. The top surface of a brick body is a plane, the middle part of abottom surface is an arc-shaped surface which is concaved towards the interior of the brick body, and the arc-shaped surface is parallel to the long side of the bottom surface so as to enable the bottom of the brick body to form a horizontally communicated cavity; a plurality of porous channels, which are communicated up and down, are distributed in the brick body. The plurality of porous channels, which are communicated up and down, are distributed in the brick body of the porous brick provided by the invention, the porous brick is conducive to being washed in the process of enabling a propylene product, which is prepared through catalytic reaction, to go downwards, and the wear-resisting property of the porous brick is improved; by designing a bottom arc surface, a cavity is formed between the bottom arc surface