The invention provides a square steel sand burial cooling process which comprises the following steps: 1) burying a forge piece into sand, wherein the initial temperature of the forge piece buried in sand is 700-800 DEG C; 2) taking out the forge piece from the sand. By utilizing the square steel sand burial cooling process provided by the invention, grains of square steel can be prevented from growing too much so as to be beneficial to internal stress diffusion; the deformation possibility is small, and white points can be eliminated and reduced.