Coking of pulverized coal furnace in thermal power stations is a common phenomenon of coal-fired industrial boiler.Since the establishment of Qianbei Power Station in Jinsha,Guizhou,the average annual coking frequency of boilers has reached 52 times per year,which has seriously affected the normal production of the power station.In order to ensure production,blasting decoking is adopted during the overhaul of the 3# boiler in the power station.The boiler coke is mostly attached to the water-cooled wall of the pulverized coal boiler.So,the first job is to analyze the blasting environment,furnace space,the causes of coking and the components of the coke.Based on the analysis,a plan of multiple times of exposed blasting with a small charge of 0.6~1.5 kg is adopted.When the coke body is directly broken by blasting,the blast vibrations also contribute to the coke removal.According to the different positions of the coke body in the furnace,three different packaging modes are used for horizontal support,pre-slide rod and steel rope traction.In terms of safety measures,it is proposed that the time of blasting operation should be controlled within 3 min and emergency measures such as recovery of charge bag,cooling and recharging or waiting for natural explosion in high temperature environment should be taken when accidents occur.Through careful design and construction,the blast has obtained ideal results,which provides practical experience for similar coke removal projects.