Research conclusions:(1)Based on the load structure model，through the investigation and analysis，the defined equation of the stress state of the reinforced bar is obtained，and applicable to large and small eccentric compressive members of reinforced concrete tunnel lining structure function and limit state equation was established.(2)According to the reinforced concrete lining function，using JC method basic principle，through the analysis and derivation，we put forward a set of the reliability analysis method suitable for reinforced concrete lining structure，and proved to be successful in the reliability index calculation of Railway Tunnel standard drawing lining.(3)The reinforced concrete lining function and the reliability analysis method can be directly used to guide the design of the railway reinforced concrete tunnel lining.