The invention relates to a 
thermal expansion stone 
cracking agent, and belongs to the material science and 
new energy crossing field. The granular 
thermal expansion stone 
cracking agent is obtained through the following steps: weighing 
solid powders with the particle size of 1-100[mu]m according to a formula, uniformly mixing to obtain a 
powder mixture, adding 
starch gum into the 
powder mixture, uniformly stirring, kneading until dough with moderate 
hardness is obtained, and granulating. The prepared stone 
cracking agent is granular in shape, is convenient for 
filling in boring, can meet filing density requirements of cracked stones without tamping by using pneumatic picks, 
impact drills or special tools, and has the advantages of small stone cracking sound, 
fast speed, high efficiency, avoiding of water resource wastes and land surface 
pollution due to no use of water as a reaction 
raw material, clean use process, and simple, safe and convenient use operation; obtained products have good quality, and are safe and stable to store; the production process of the stone cracking agent has no emission of three wastes, is harmless to 
human body and environment, and is clean and environmentally-friendly; and the use process of the stone cracking agent is free from water, and is environmentally-friendly, and required raw materials have wide sources, so the economic cost is low.