The invention relates to a method for casting a toothed plate of a sintering machine. The method includes adopting a combined casting process to combine the toothed plate to be a whole circle, performing integral casting, cutting the toothed plate into single castings, and performing thermal treatment. The method has the advantages that by a mode of integral casting before cutting, casting production time of the toothed plate is reduced; finished product rate of toothed plate castings of an original sintering machine is increased from 60% to 65%; casting frequency is lowered, so that pollution to environment and damage to human body are reduced.