The invention relates to a preparation method of a thermal shock resistant burner block with low creep deformation, and belongs to the technical field of material preparation. The preparation method comprises the following steps: processing rice husks, carbonizing rice husks to obtain carbonized rice husk powder, grinding bauxite and kyanite, mixing bauxite, kyanite, carbonized rice husk powder, and polyvinyl alcohol to obtain mixed slurry, and finally carrying out aging, pressing, and burning to obtain the burner block. The prepared burner block has a high thermal stability, the deformation is difficult to happen, the thermal shock stability (times) is more than 45 times 1100 DEG C water cooling; the compression strength and rupture strength of the burner block are strong, and the using requirements of heating furnace and soaking furnace can be met.