The operational reliability of aircraft engines is crucial for flight safety, The safety of the engine and aircraft flight is directly endangered by key control parameter anomalies. In-flight shutdown incidents resulting from measurement parameter anomalies was focused on. The cause of the failure of shutdowns in-flight of turbofan engines was analyzed, corresponding remediation strategies was proposed. The solution and method for enhance the fault tolerance of engine control systems through redundancy design and parameter reconstruction mechanisms was propford, which could improve engine reliability without increasing mechanical complexity and hardware. The static pressure of the outlet of high-pressure compressor of a turbofan engine (P_3s) was reconstituted, by the characteristic parameters of the intake and the measured parameters of the engine's characteristic sections. The accuracy of reconstruction for steady-state is over 97%. The control logic of the measured value and the reconstructed value is designed and successfully applied to the engine, which effectively solved the problem of engine shutdown abnormally caused by bleed air pipe rupture.