Abstract: It combines the test and practice of deep-hole tiny difference control blasting technical for limestone that lied in open quarry when the writer worked in Zhujiang Cement Plant for many years. It studies blasting network design, blasting process control, blasting direction control, rock move directions, grain size control, blasting vibration, root and solid wall conditions, blasting piles relax situation and shape through computer simulating blasting test in order to come true the technical called " blasting from one hole to another", improve the blasting results. Modify the old blasting parameter and control the key technical of open quarry and optimize the blasting parameter of open quarry. To come true the minimum cost, but maximum benefits, reduce quarry integration cost, make use of national quarry resource fully and in reason.