The utility model relates to a tunnel kiln car, in particular to a tunnel kiln car table board which is composed of a plurality of base bricks and is integrally of a cuboid combination structure. Expansion gaps are arranged between adjacent base bricks. In the horizontal direction, the table body is composed of 2 to 4 large base bricks; in the longitudinal direction, the table body is composed of 3 to 5 large base bricks. V-shaped groove channels are arranged on the upper surfaces of adjacent base bricks, the vertical height h of each base brick is 100mm to 150mm, the range a of each preserved expansion gap is 15mm to 30mm, and the base bricks are made of andalusite materials or magnesium aluminate spinel materials. The tunnel kiln car table board is simple in structure, can save energy, improves quality of bottom layer products, further improves production efficiency, is used for sintering different products and is suitable for being popularized and implemented.