This paper presents a successful example of an 80 m reinforced concrete chimney by directional blasting method in a complex environment.Through the structural analysis of the chimney,strut principle was used to design parameters of blasting cut and the parallel closed network was used for stability and safety.The paper also introduces the directional blasting method of the chimney and safety protection measures to reduce vibration and the second touchdown in detail.After the blasting,the chimney crashed down by design,which provides a good example for the similar engineering.