Abstract: The fault-tolerant mechanism carries the mission of stimulating and protecting the reform and innovation of cadres in the comprehensive deepening of the reform period. The semi-structured interviews were conducted with 30 government personnel from 9 prefecture-level cities in L Province， and the grounded theory was applied to code and construct a four-dimensional theoretical model of “scene-system-content-action” with the help of MAXQDA analysis software. The scene dimension is the source generated induced variable that the fault-tolerant mechanism fails to reach the ideal state， the institutional dimension is the reality condition variable， the content dimension is the internal observation variable， and the action dimension is the external situation variable. Then corresponding control strategies were put forward around the constituent factors and operational mechanism of the above four main categories， including cultivating the political ecological environment of positive atmosphere， consolidating the system foundation of front-end research and judgment and terminal guarantee， examining and approving the boundary extension of being fault-tolerant and flexible， and exploring the scientific and reasonable operation procedure.

Key words: fault-tolerant mechanism; influence dimension; control path; grounded theory