Abstract: The resources and production of shale gas in China were introduced. The difficulties of shale gas development in terms of geology, drilling, completion, gas production, fracturing, test, monitoring and maintenance operations and the characteristics of " factory-like” shale gas operation were illustrated. The characteristics of individual fracturing, zipper fracturing and simultaneous fracturing were described and compared. The research and application status of the method and tool of fullbore controllable infinite sliding sleeve completion were introduced. The concept of applying the well integrity standard to the integrated management of all operations of one shale gas well in the whole life cycle was discussed in detail. The sketch of well barrier of horizontal well for shale gas development was provided. The design, operation and management contents, characteristics and difficulties of well integrity and well barrier of shale gas well during each operation in the whole life cycle were explained with graphs and words.