Abstract: Since there are laminated repeating protection and restoration in an internet laminar model, it makes the realization of the internetwork communication very complex, affects the network transport efficiency and makes the network block. With the wide use of DWDM and the improvement of network sublayer performance, the laminated repeating protection and restoration in internet will never be required. Therefore, the future optical internet threelaminar (application, IP and optical interconnection) protocol model was used and the protection for the optical interconnection lamina was investigated. Based on the investigation, a method of partially shared path protection (PSPP) was put forward. This model can make full use of agile restoration mechanism of the IP lamina and protection restoration mechanism of the optical interconnection lamina to improve network transport efficiency and meet the need of the development at top speed of internet work for the transmission bandwidth.