Taking the steel and concrete composite immersed tunnel pre-bidding project from Shenzhen to Zhongshan as an example,aiming at the construction characteristics of the steel and concrete composite immersed tunnel,we draw on the stress and deformation research on creep and shrinkage effect of steel and concrete composite beams,and study the stress and deformation of steel shell concrete structure in the long term effects.We calculate the stress and deformation of transverse structure of immersed tunnel in long-term effects by an easy method.The results show that the concrete lost almost half of the stress because of the creep and shrinkage.The stress of the steel casing tends to be uniform with the development of the creep and shrinkage.The bending moment of the steel casing is getting decrease with the development of the creep and shrinkage.The increase of deflection due to the effect of creep and contraction is not significant.