The curved steel pipe jacking technology, of which the pipe structure is greatly different from that of traditional reinforced concrete pipe jacking, is a new trenchless technology for water supply projects and tunnel support. There is not reliable design and construction standard for curved steel pipe jacking nowadays. The pipejoint model of curved steel pipe jacking is established by ABAQUS software so as to optimize the structure of rubber ring used in Gongbei Tunnel. The stress and contact pressure of rubber ring and installation force of pipejoint before and after optimization are studied. The analytical results show that the stress of rubber ring and installation force of pipejoint reduce obviously after optimization; and the contact pressure of optimized rubber is larger than 0.3 MPa; the optimized rubber ring is rational.