This paper briefly describes one successful blasting case that controlled blasting technology was used for once dismantlement of 16 high buildings with an area of 130,000 m2 in Yunong village in Shengzhen city,analyzes the blasting effects in brief.This dismantlement blasting was very difficult and the environment was complicated,and the minimal distances of dismantled buildings from protected buildings was only 6 ~ 8 m.The three kinds of blasting plans(in-situ collapse,directional falling down,and directional dismantling dilapidation) were used to ensure blasting effects.