Taking Meiyuan station of Guangzhou track transportation line 3 as an example,the authors introduce in detail the composition,key technologies and processes and points for attention of installation technology on central portal plate of shield,as well as its application in engineering.

Through analyzed molding process and moldflow and mold structure design,Satisfied the automobile door plate mold,the product assembly,the outward appearance request and so on each technical specification.

By using angular deformation principle to deal with the problem of internal force calculation of city-gate section channel in soft soil foundation,a new brief and exact method is presented,it will be useful in engineering practice.